[CI] Use oneAPI for Linux postcommit build

Signed-off-by: Sarnie, Nick <[email protected]>

Author: sarnex

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

@@ -156,6 +156,11 @@ jobs:
         ref: ${{ inputs.build_ref || github.sha }}
         merge_ref: ${{ inputs.merge_ref }}
         cache_path: "/__w/repo_cache/"
+    - name: Setup oneAPI env
+      if: ${{ inputs.cc == 'icx' || inputs.cxx == 'icpx' }}
+      run: |
+         source /opt/whatever
+    
     - name: Configure
       env:
         CC: ${{ inputs.cc }}

.github/workflows/sycl-post-commit.yml

@@ -32,11 +32,14 @@ jobs:
     if: github.repository == 'intel/llvm'
     uses: ./.github/workflows/sycl-linux-build.yml
     with:
+      build_image: "ghcr.io/intel/llvm/sycl_ubuntu2404_build_oneapi:latest"
       build_cache_root: "/__w/llvm"
-      build_cache_suffix: default
+      build_cache_suffix: icx
       build_artifact_suffix: default
       build_configure_extra_args: --no-assertions --hip --cuda --native_cpu --cmake-opt="-DSYCL_ENABLE_STACK_PRINTING=ON" --cmake-opt="-DSYCL_LIB_WITH_DEBUG_SYMBOL=ON"      
       merge_ref: ''
+      cc: icx
+      cxx: icpx
 
   e2e-lin:
     needs: [build-lin]