[SYCL][CI] Improve clang++ version output

This patch adds "Nightly build" string to clang version output.
Previously it was like:
clang version 22.0.0git (https://github.com/intel/llvm.git
2de7d37)
Now it looks like:
clang version 22.0.0git (https://github.com/intel/llvm.git 2de7d37 Nightly build)

I'm preserving the repo path, but extending the revision. Anyways, we need to define both CLANG_VC_REPOSITORY and CLANG_VC_REVISION CMake variables to redefine the output, see: llvm/llvm/cmake/modules/GenerateVersionFromVCS.cmake

Moreover, we need to define LLVM_VC_REPOSITORY & LLVM_VC_REVISION,
because if it's not the same as CLANG_VC_* variables, there will be two
sections of brackets after clang version, like:
clang version 22.0.0git (https://github.com/intel/llvm.git
2de7d37) (https://github.com/intel/llvm.git 2de7d37 Nightly build)

This is kind of hacky, but it allows as not to change the source code.

Author: KornevNikita

.github/workflows/sycl-linux-build.yml

@@ -201,10 +201,11 @@ jobs:
           -s $GITHUB_WORKSPACE/src -o $GITHUB_WORKSPACE/build \
           -DCMAKE_INSTALL_PREFIX=$GITHUB_WORKSPACE/toolchain \
           -t Release \
-          --ci-defaults --use-zstd ${{ inputs.build_configure_extra_args }} \
+          --ci-defaults --use-zstd \
           -DCMAKE_C_COMPILER_LAUNCHER=ccache \
           -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
-          -DLLVM_INSTALL_UTILS=ON
+          -DLLVM_INSTALL_UTILS=ON \
+          ${{ inputs.build_configure_extra_args }}
     - name: Compile
       id: build
       # Emulate default value for manual dispatch as we've run out of available arguments.

.github/workflows/sycl-nightly.yml

@@ -29,7 +29,10 @@ jobs:
     secrets: inherit
     with:
       build_cache_root: "/__w/"
-      build_configure_extra_args: '--hip --cuda'
+      build_configure_extra_args: |
+        --hip --cuda \
+        -DLLVM_VC_REPOSITORY="${{ github.repositoryUrl }}" -DLLVM_VC_REVISION="${{ github.sha }} Nightly build" \
+        -DCLANG_VC_REPOSITORY="${{ github.repositoryUrl }}" -DCLANG_VC_REVISION="${{ github.sha }} Nightly build"
       build_image: ghcr.io/intel/llvm/ubuntu2204_build:latest
 
       retention-days: 90
@@ -191,7 +194,10 @@ jobs:
       # functionality, make sure Linux/Windows names follow the same pattern.
       toolchain_artifact_filename: sycl_windows.tar.gz
       # Disable the spirv-dis requirement as to not require SPIR-V Tools.
-      build_configure_extra_args: -DLLVM_SPIRV_ENABLE_LIBSPIRV_DIS=off
+      build_configure_extra_args: |
+        -DLLVM_SPIRV_ENABLE_LIBSPIRV_DIS=off ^
+        -DLLVM_VC_REPOSITORY="${{ github.repositoryUrl }}" -DLLVM_VC_REVISION="${{ github.sha }} Nightly build" ^
+        -DCLANG_VC_REPOSITORY="${{ github.repositoryUrl }}" -DCLANG_VC_REVISION="${{ github.sha }} Nightly build"
       build_target: all
 
   e2e-win:

.github/workflows/sycl-windows-build.yml

@@ -147,13 +147,14 @@ jobs:
         IF NOT EXIST D:\github\_work\cache MKDIR D:\github\_work\cache
         IF NOT EXIST D:\github\_work\cache\${{inputs.build_cache_suffix}} MKDIR D:\github\_work\cache\${{inputs.build_cache_suffix}}
         python.exe src/buildbot/configure.py -o build ^
-          --ci-defaults --use-zstd %ARGS% ^
+          --ci-defaults --use-zstd ^
           "-DCMAKE_C_COMPILER=${{inputs.cxx}}" ^
           "-DCMAKE_CXX_COMPILER=${{inputs.cxx}}" ^
           "-DCMAKE_INSTALL_PREFIX=%GITHUB_WORKSPACE%\install" ^
           -DCMAKE_CXX_COMPILER_LAUNCHER=ccache ^
           -DCMAKE_C_COMPILER_LAUNCHER=ccache ^
-          -DLLVM_INSTALL_UTILS=ON
+          -DLLVM_INSTALL_UTILS=ON ^
+          %ARGS%
     - name: Build
       id: build
       shell: bash