Support for Enterprise WDK

Feature Request

Enterprise WDK is a fully portable distribution of MSVC. It comes with

1. LaunchBuildEnv.cmd, which provides the environment for MSBuild based projects.
2. Program Files\Microsoft Visual Studio\2019\BuildTools\Common7\Tools\VsDevCmd.bat, which is not usable by default, but can be made usable by patching Program Files/Microsoft Visual Studio/2019/BuildTools/Common7/Tools/vsdevcmd/core/winsdk.bat:

--- a/winsdk.bat
+++ b/winsdk.bat
@@ -79,11 +79,9 @@
 :GetWin10SdkDirHelper
 
 @REM Get Windows 10 SDK installed folder
-for /F "tokens=1,2*" %%i in ('reg query "%1\Microsoft\Microsoft SDKs\Windows\v10.0" /v "InstallationFolder"') DO (
-    if "%%i"=="InstallationFolder" (
-        SET WindowsSdkDir=%%~k
-    )
-)
+pushd "%~dp0..\..\..\..\..\..\..\Windows Kits\10\"
+set WindowsSdkDir=%CD%\
+popd
 
 @REM get windows 10 sdk version number
 setlocal enableDelayedExpansion
@@ -243,14 +241,9 @@
 exit /B 0
 
 :GetUniversalCRTSdkDirHelper
-for /F "tokens=1,2*" %%i in ('reg query "%1\Microsoft\Windows Kits\Installed Roots" /v "KitsRoot10"') DO (
-    if "%%i"=="KitsRoot10" (
-        SET UniversalCRTSdkDir=%%k
-    )
-)
-if "%UniversalCRTSdkDir%"=="" (
-  exit /B 1
-)
+pushd "%~dp0..\..\..\..\..\..\..\Windows Kits\10\"
+set UniversalCRTSdkDir=%CD%\
+popd
 
 setlocal enableDelayedExpansion
 for /f %%i IN ('dir "%UniversalCRTSdkDir%include\" /b /ad-h /on') DO (

VS Code, however, does not detect the compiler and include paths in any of these environments.

Start by tracing the C/C++ extension's compiler and include-path detection for MSBuild environments. Compare how LaunchBuildEnv.cmd and the patched VsDevCmd.bat expose their environment, then verify that Enterprise WDK installations are detected and their compiler and include paths are reported correctly.