Make CMake Tools aware of the legacy version of lldb-mi from cpptools

Nobody has claimed this yet.

### Brief Issue Summary

env:
macOS 10.12.6
Xcode 9.2 (9C40b)
vs code 1.66.2
ms-vscode.cpptools-1.9.8-darwin-x64
ms-vscode.cmake-tools-1.10.5

It can not debug C++ app.

### CMake Tools Diagnostics

```shell
{
"os": "darwin",
"vscodeVersion": "1.66.2",
"cmtVersion": "1.10.5",
"configurations": [
{
"folder": "/Users/witton/CMakeTest",
"cmakeVersion": "3.22.1",
"configured": true,
"generator": "Ninja",
"usesPresets": false,
"compilers": {
"C": "/usr/bin/clang",
"CXX": "/usr/bin/clang++"
}
}
],
"cpptoolsIntegration": {
"isReady": true,
"hasCodeModel": true,
"activeBuildType": "Debug",
"buildTypesSeen": [
"Debug"
],
"requests": [
"file:///Users/witton/CMakeTest/main.cpp"
],
"responses": [
{
"uri": "file:///Users/witton/CMakeTest/main.cpp",
"configuration": {
"defines": [],
"standard": "c++14",
"includePath": [],
"compilerPath": "/usr/bin/clang++",
"compilerArgs": [
"-g",
"-O0",
"-Wall",
"-std=c++14"
]
}
}
],
"partialMatches": [],
"targetCount": 1,
"executablesCount": 1,
"librariesCount": 0,
"targets": [
{
"name": "demo",
"type": "EXECUTABLE"
}
]
},
"settings": [
{
"communicationMode": "automatic",
"useCMakePresets": "auto",
"configureOnOpen": true
}
]
}
```

### Debug Log

```shell
[extension] [8366] cmake.debugTarget started
[main] Building folder: CMakeTest demo
[main] Saving open files before configure/build
[build] Starting build
[driver] Start build demo
[proc] Executing command: /usr/local/bin/cmake --build /Users/witton/CMakeTest/build --config Debug --target demo --
[build] ninja: no work to do.
[cmakefileapi-parser] Read reply folder: /Users/witton/CMakeTest/build/.cmake/api/v1/reply
[cmakefileapi-parser] Found index files: ["cache-v2-d0ba8fd5bc2f594b735c.json","codemodel-v2-3c4997f1553d6835a8ef.json","directory-.-Debug-f5ebdc15457944623624.json","index-2022-05-05T14-38-31-0812.json","target-demo-Debug-0a2e5169e4b80ae610d6.json","toolchains-v1-4efbd97b41bf961ec1dc.json"]
[build] Build finished with exit code 0
[cache] Reading CMake cache file /Users/witton/CMakeTest/build/CMakeCache.txt
[cache] Parsing CMake cache string
[cache] Reading CMake cache file /Users/witton/CMakeTest/build/CMakeCache.txt
[cache] Parsing CMake cache string
[proc] Executing command: /usr/bin/lldb-mi --version
[proc] Executing command: /Users/witton/.vscode/extensions/ms-vscode.cpptools-1.9.8-darwin-x64/debugAdapters/lldb-mi/bin/lldb-mi --version
[proc] Executing command: /usr/bin/gdb --version
[proc] Executing command: /usr/bin/lldb --version
[proc] Executing command: /usr/bin/lldb --version
[main] Debug configuration from cache: {"type":"cppdbg","name":"Debug demo","request":"launch","cwd":"/Users/witton/CMakeTest/build","args":[],"MIMode":"lldb","miDebuggerPath":"/usr/bin/lldb","program":"/Users/witton/CMakeTest/build/demo"}
[main] Starting debugger with following configuration. {"workspace":"file:///Users/witton/CMakeTest","config":{"type":"cppdbg","name":"Debug demo","request":"launch","cwd":"/Users/witton/CMakeTest/build","args":[],"MIMode":"lldb","miDebuggerPath":"/usr/bin/lldb","program":"/Users/witton/CMakeTest/build/demo","environment":[{"name":"ELECTRON_RUN_AS_NODE","value":"1"},{"name":"TMPDIR","value":"/var/folders/my/pxc3drzx37d95dp6dmkd7y2h0000gn/T/"},{"name":"__CF_USER_TEXT_ENCODING","value":"0x1F5:0x19:0x34"},{"name":"SHELL","value":"/bin/bash"},{"name":"HOME","value":"/Users/witton"},{"name":"Apple_PubSub_Socket_Render","value":"/private/tmp/com.apple.launchd.vxo8WaTIAw/Render"},{"name":"SSH_AUTH_SOCK","value":"/private/tmp/com.apple.launchd.UCKTvzSSp6/Listeners"},{"name":"PATH","value":"/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/share/dotnet:~/.dotnet/tools:/usr/local/go/bin:/usr/local/mysql/bin"},{"name":"LOGNAME","value":"witton"},{"name":"XPC_SERVICE_NAME","value":"com.microsoft.VSCode.34496"},{"name":"USER","value":"witton"},{"name":"XPC_FLAGS","value":"0x0"},{"name":"ORIGINAL_XDG_CURRENT_DESKTOP","value":"undefined"},{"name":"VSCODE_CWD","value":"/"},{"name":"VSCODE_NLS_CONFIG","value":"{\"locale\":\"zh-cn\",\"availableLanguages\":{\"*\":\"zh-cn\"},\"_languagePackId\":\"1a7316c624e1dd66d26cf581ee0fb4ca.zh-cn\",\"_translationsConfigFile\":\"/Users/witton/Library/Application Support/Code/clp/1a7316c624e1dd66d26cf581ee0fb4ca.zh-cn/tcf.json\",\"_cacheRoot\":\"/Users/witton/Library/Application Support/Code/clp/1a7316c624e1dd66d26cf581ee0fb4ca.zh-cn\",\"_resolvedLanguagePackCoreLocation\":\"/Users/witton/Library/Application Support/Code/clp/1a7316c624e1dd66d26cf581ee0fb4ca.zh-cn/dfd34e8260c270da74b5c2d86d61aee4b6d56977\",\"_corruptedFile\":\"/Users/witton/Library/Application Support/Code/clp/1a7316c624e1dd66d26cf581ee0fb4ca.zh-cn/corrupted.info\",\"_languagePackSupport\":true}"},{"name":"VSCODE_CODE_CACHE_PATH","value":"/Users/witton/Library/Application Support/Code/CachedData/dfd34e8260c270da74b5c2d86d61aee4b6d56977"},{"name":"VSCODE_IPC_HOOK","value":"/Users/witton/Library/Application Support/Code/1.66.2-main.sock"},{"name":"VSCODE_PID","value":"10403"},{"name":"MANPATH","value":"/usr/local/share/man:"},{"name":"HOMEBREW_BOTTLE_DOMAIN","value":"https://mirrors.ustc.edu.cn/homebrew-bottles/bottles"},{"name":"CLICOLOR","value":"1"},{"name":"HOMEBREW_REPOSITORY","value":"/usr/local/Homebrew"},{"name":"PYTHONIOENCODING","value":"utf-8"},{"name":"PWD","value":"/"},{"name":"SHLVL","value":"1"},{"name":"HOMEBREW_PREFIX","value":"/usr/local"},{"name":"INFOPATH","value":"/usr/local/share/info:"},{"name":"HOMEBREW_CELLAR","value":"/usr/local/Cellar"},{"name":"_","value":"/Applications/Visual Studio Code.app/Contents/MacOS/Electron"},{"name":"VSCODE_AMD_ENTRYPOINT","value":"vs/workbench/api/node/extensionHostProcess"},{"name":"VSCODE_PIPE_LOGGING","value":"true"},{"name":"VSCODE_VERBOSE_LOGGING","value":"true"},{"name":"VSCODE_LOG_NATIVE","value":"false"},{"name":"VSCODE_IPC_HOOK_EXTHOST","value":"/var/folders/my/pxc3drzx37d95dp6dmkd7y2h0000gn/T/vscode-ipc-b8711c85-742a-47a1-878d-e832b33f6483.sock"},{"name":"VSCODE_HANDLES_UNCAUGHT_ERRORS","value":"true"},{"name":"VSCODE_LOG_STACK","value":"false"},{"name":"APPLICATION_INSIGHTS_NO_DIAGNOSTIC_CHANNEL","value":"1"}]},"environment":[{"name":"ELECTRON_RUN_AS_NODE","value":"1"},{"name":"TMPDIR","value":"/var/folders/my/pxc3drzx37d95dp6dmkd7y2h0000gn/T/"},{"name":"__CF_USER_TEXT_ENCODING","value":"0x1F5:0x19:0x34"},{"name":"SHELL","value":"/bin/bash"},{"name":"HOME","value":"/Users/witton"},{"name":"Apple_PubSub_Socket_Render","value":"/private/tmp/com.apple.launchd.vxo8WaTIAw/Render"},{"name":"SSH_AUTH_SOCK","value":"/private/tmp/com.apple.launchd.UCKTvzSSp6/Listeners"},{"name":"PATH","value":"/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/share/dotnet:~/.dotnet/tools:/usr/local/go/bin:/usr/local/mysql/bin"},{"name":"LOGNAME","value":"witton"},{"name":"XPC_SERVICE_NAME","value":"com.microsoft.VSCode.34496"},{"name":"USER","value":"witton"},{"name":"XPC_FLAGS","value":"0x0"},{"name":"ORIGINAL_XDG_CURRENT_DESKTOP","value":"undefined"},{"name":"VSCODE_CWD","value":"/"},{"name":"VSCODE_NLS_CONFIG","value":"{\"locale\":\"zh-cn\",\"availableLanguages\":{\"*\":\"zh-cn\"},\"_languagePackId\":\"1a7316c624e1dd66d26cf581ee0fb4ca.zh-cn\",\"_translationsConfigFile\":\"/Users/witton/Library/Application Support/Code/clp/1a7316c624e1dd66d26cf581ee0fb4ca.zh-cn/tcf.json\",\"_cacheRoot\":\"/Users/witton/Library/Application Support/Code/clp/1a7316c624e1dd66d26cf581ee0fb4ca.zh-cn\",\"_resolvedLanguagePackCoreLocation\":\"/Users/witton/Library/Application Support/Code/clp/1a7316c624e1dd66d26cf581ee0fb4ca.zh-cn/dfd34e8260c270da74b5c2d86d61aee4b6d56977\",\"_corruptedFile\":\"/Users/witton/Library/Application Support/Code/clp/1a7316c624e1dd66d26cf581ee0fb4ca.zh-cn/corrupted.info\",\"_languagePackSupport\":true}"},{"name":"VSCODE_CODE_CACHE_PATH","value":"/Users/witton/Library/Application Support/Code/CachedData/dfd34e8260c270da74b5c2d86d61aee4b6d56977"},{"name":"VSCODE_IPC_HOOK","value":"/Users/witton/Library/Application Support/Code/1.66.2-main.sock"},{"name":"VSCODE_PID","value":"10403"},{"name":"MANPATH","value":"/usr/local/share/man:"},{"name":"HOMEBREW_BOTTLE_DOMAIN","value":"https://mirrors.ustc.edu.cn/homebrew-bottles/bottles"},{"name":"CLICOLOR","value":"1"},{"name":"HOMEBREW_REPOSITORY","value":"/usr/local/Homebrew"},{"name":"PYTHONIOENCODING","value":"utf-8"},{"name":"PWD","value":"/"},{"name":"SHLVL","value":"1"},{"name":"HOMEBREW_PREFIX","value":"/usr/local"},{"name":"INFOPATH","value":"/usr/local/share/info:"},{"name":"HOMEBREW_CELLAR","value":"/usr/local/Cellar"},{"name":"_","value":"/Applications/Visual Studio Code.app/Contents/MacOS/Electron"},{"name":"VSCODE_AMD_ENTRYPOINT","value":"vs/workbench/api/node/extensionHostProcess"},{"name":"VSCODE_PIPE_LOGGING","value":"true"},{"name":"VSCODE_VERBOSE_LOGGING","value":"true"},{"name":"VSCODE_LOG_NATIVE","value":"false"},{"name":"VSCODE_IPC_HOOK_EXTHOST","value":"/var/folders/my/pxc3drzx37d95dp6dmkd7y2h0000gn/T/vscode-ipc-b8711c85-742a-47a1-878d-e832b33f6483.sock"},{"name":"VSCODE_HANDLES_UNCAUGHT_ERRORS","value":"true"},{"name":"VSCODE_LOG_STACK","value":"false"},{"name":"APPLICATION_INSIGHTS_NO_DIAGNOSTIC_CHANNEL","value":"1"}]}
[extension] [8366] cmake.debugTarget finished (returned undefined)
```

### Additional Information

When I add in settings.json:
```
"cmake.debugConfig": {
"MIMode": "lldb",
"miDebuggerPath": "/Users/witton/.vscode/extensions/ms-vscode.cpptools-1.9.8-darwin-x64/debugAdapters/lldb-mi/bin/lldb-mi"
},
```

it report:
`Unable to find GDB in default search path and /Users/witton/.vscode/extensions/ms-vscode.cpptools-1.9.8-darwin-x64/debugAdapters/lldb-mi/bin/lldb-mi.`

set
`
"miDebuggerPath": "/Applications/Xcode.app/Contents/Developer/usr/bin/lldb-mi"
`

or set
`
"MIMode": "gdb",
"miDebuggerPath": "/usr/local/bin/gdb"
`
it does not take effect.

Start with the CMake Tools debug log and the cmake.debugConfig in settings.json, focusing on how the legacy lldb-mi path from cpptools is selected. Done means CMake Tools recognizes that legacy debugger on the reported macOS and allows the C++ app to start debugging.

Written by the indexing model from the issue text.