"CMake: Install" command doesn't elevate child process on Windows

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### Brief Issue Summary

CMake --install on Windows requires elevation to copy files when prefix points to Program Files folder.

### CMake Tools Diagnostics

_No response_

### Debug Log

_No response_

### Additional Information

Here is example output for LevelDB installation:
[main] Building folder: leveldb install
[build] Starting build
[proc] Executing command: "C:\Program Files\Microsoft Visual Studio\2022\Preview\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe" --build s:/leveldb/build --config Release --target install --
[build] [1/1 0% :: 0.000] Install the project...
[build] -- Install configuration: "Release"
[build] -- Installing: C:/Program Files (x86)/leveldb/lib/libleveldb.a
[build] CMake Error at cmake_install.cmake:44 (file):
[build] file INSTALL cannot copy file "S:/leveldb/build/Release/libleveldb.a" to
[build] "C:/Program Files (x86)/leveldb/lib/libleveldb.a": Permission denied.
[build]
[build]
[build] FAILED: CMakeFiles/Release/install.util
[build] cmd.exe /C "cd /D S:\leveldb\build && "C:\Program Files\Microsoft Visual Studio\2022\Preview\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe" -DBUILD_TYPE=Release -P cmake_install.cmake"
[build] ninja: build stopped: subcommand failed.
[proc] The command: "C:\Program Files\Microsoft Visual Studio\2022\Preview\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin\cmake.exe" --build s:/leveldb/build --config Release --target install -- exited with code: 1
[driver] Build completed: 00:00:00.096
[build] Build finished with exit code 1

The reported entry point is the Windows CMake --build command using --target install, which fails when installing into Program Files. Start by tracing how CMake Tools launches and handles this child process on Windows; done means protected-path installs can elevate successfully instead of producing the shown permission-denied error.

Written by the indexing model from the issue text.