Add -enable-lit option to hcttest (#4869)

This patch attempts to translate HCTTest options to LIT build targets.
Since HCTTest and lit break up tests differently the mapping isn't quite
the same, but it should be close enough.

Before we can migrate our automation builds to using lit we need to
separate out the exec tests so that they can be disabled on the ADO
bots.

utils/hct/hcttest.cmd

@@ -23,6 +23,7 @@ set TEST_DXILCONV_FILTER=
 set TEST_EXEC_FUTURE=0
 set TEST_EXTRAS=0
 set TEST_EXEC_REQUIRED=0
+set TEST_USE_LIT=0
 set TEST_CLANG_FILTER=
 set TEST_EXEC_FILTER=ExecutionTest::*
 set LOG_FILTER=/logOutput:LowWithConsoleBuffering
@@ -143,6 +144,8 @@ if "%1"=="-clean" (
   set TEST_EXTRAS=1
 ) else if "%1"=="-ninja" (
   set GENERATOR_NINJA=1
+) else if "%1"=="-enable-lit" (
+  set TEST_USE_LIT=1
 ) else if "%1"=="-rel" (
   set BUILD_CONFIG=Release
 ) else if /i "%1"=="-Release" (
@@ -252,11 +255,45 @@ if "%TEST_CLEAN%"=="1" (
   )
 )
 
+if "%TEST_USE_LIT%"=="1" (
+  rem LIT does not separate exect tests from other taef tests.
+  if "%TEST_EXEC%"=="1" (
+    set TEST_CLANG=1
+  )
+  if "%TEST_SPIRV%"=="1" (
+    set TEST_CLANG=1
+  )
+  if "%TEST_ALL%"=="1" (
+    rem check all includes clang, dxilconv, and exec
+    cmake --build %HLSL_BLD_DIR% --config %BUILD_CONFIG% --target check-all
+    set RES_CLANG=!ERRORLEVEL!
+    set RES_DXILCONV=%RES_CLANG%
+    set RES_EXEC=%RES_CLANG%
+  ) else (
+    if "%TEST_DXILCONV%"=="1" (
+      cmake --build %HLSL_BLD_DIR% --config %BUILD_CONFIG% --target check-dxilconv
+      set RES_DXILCONV=!ERRORLEVEL!
+    )
+    if "%TEST_CLANG%"=="1" (
+      cmake --build %HLSL_BLD_DIR% --config %BUILD_CONFIG% --target check-clang
+      set RES_CLANG=!ERRORLEVEL!
+      set RES_EXEC=%RES_CLANG%
+    )
+  )
+  set TEST_CLANG=0
+  set TEST_DXILCONV=0
+  set TEST_SPIRV=0
+  set TEST_EXEC=0
+)
+
 if not exist %TEST_DIR% (mkdir %TEST_DIR%)
 
 echo Copying binaries to test to %TEST_DIR%:
 if "%CUSTOM_BIN_SET%"=="" (
-  call %HCT_DIR%\hctcopy.cmd %BIN_DIR% %TEST_DIR% dxa.exe dxc.exe dxexp.exe dxopt.exe dxr.exe dxv.exe clang-hlsl-tests.dll dxcompiler.dll d3dcompiler_dxc_bridge.dll dxl.exe dxc_batch.exe dxlib_sample.dll
+  if not "%TEST_USE_LIT%"=="1" (
+    call %HCT_DIR%\hctcopy.cmd %BIN_DIR% %TEST_DIR% clang-hlsl-tests.dll
+  )
+  call %HCT_DIR%\hctcopy.cmd %BIN_DIR% %TEST_DIR% dxa.exe dxc.exe dxexp.exe dxopt.exe dxr.exe dxv.exe dxcompiler.dll d3dcompiler_dxc_bridge.dll dxl.exe dxc_batch.exe dxlib_sample.dll
   if errorlevel 1 exit /b 1
   if "%TEST_DXILCONV%"=="1" (
     call %HCT_DIR%\hctcopy.cmd %BIN_DIR% %TEST_DIR% dxbc2dxil.exe dxilconv-tests.dll opt.exe