Add option for extra cmake args

Author: llvm-beanz

.github/workflows/test-all.yaml

@@ -59,6 +59,11 @@ on:
         - macOS
         - GPU-Intel
         - GPU-NV
+      LLVM-ExtraCMakeArgs:
+        description: 'Extra CMake Args for LLVM'
+        required: false
+        default: ''
+        type: string
   workflow_call:
     inputs:
       HLSLTest-branch:
@@ -100,6 +105,11 @@ on:
         required: false
         default: 'check-hlsl'
         type: string
+      LLVM-ExtraCMakeArgs:
+        description: 'Extra CMake Args for LLVM'
+        required: false
+        default: ''
+        type: string
 
 jobs:
   build:
@@ -144,7 +154,7 @@ jobs:
             cd llvm-project
             mkdir build
             cd build
-            cmake -G Ninja -DCMAKE_BUILD_TYPE=${{ inputs.BuildType }} -C ${{ github.workspace }}/llvm-project/clang/cmake/caches/HLSL.cmake -C ${{ github.workspace }}/HLSLTest/cmake/caches/sccache.cmake -DDXC_DIR=${{ github.workspace }}/DXC/build/bin -DLLVM_EXTERNAL_HLSLTEST_SOURCE_DIR=${{ github.workspace }}/HLSLTest -DLLVM_EXTERNAL_PROJECTS="HLSLTest" -DLLVM_LIT_ARGS="--xunit-xml-output=testresults.xunit.xml -v" -DHLSLTEST_TEST_CLANG=${{ inputs.Test-Clang }} ${{ github.workspace }}/llvm-project/llvm/
+            cmake -G Ninja ${{ inputs.LLVM-ExtraCMakeArgs }} -DCMAKE_BUILD_TYPE=${{ inputs.BuildType }} -C ${{ github.workspace }}/llvm-project/clang/cmake/caches/HLSL.cmake -C ${{ github.workspace }}/HLSLTest/cmake/caches/sccache.cmake -DDXC_DIR=${{ github.workspace }}/DXC/build/bin -DLLVM_EXTERNAL_HLSLTEST_SOURCE_DIR=${{ github.workspace }}/HLSLTest -DLLVM_EXTERNAL_PROJECTS="HLSLTest" -DLLVM_LIT_ARGS="--xunit-xml-output=testresults.xunit.xml -v" -DHLSLTEST_TEST_CLANG=${{ inputs.Test-Clang }} ${{ github.workspace }}/llvm-project/llvm/
             ninja hlsl-test-depends
       - name: Run HLSL Tests
         run: |