workflows: Fix libclc-tests (llvm#101524)

The old out-of-tree build configuration stopped working and in tree
builds are supported now, so we should use the in tree configuration.
The only downside is we can't run the tests any more, but at least we
will be able to test the build again.

(cherry picked from commit 0512ba0)

.github/workflows/llvm-project-tests.yml

@@ -131,6 +131,7 @@ jobs:
                 -DCMAKE_BUILD_TYPE=Release \
                 -DLLVM_ENABLE_ASSERTIONS=ON \
                 -DLLDB_INCLUDE_TESTS=OFF \
+                -DLIBCLC_TARGETS_TO_BUILD="amdgcn--;amdgcn--amdhsa;r600--;nvptx--;nvptx64--;nvptx--nvidiacl;nvptx64--nvidiacl" \
                 -DCMAKE_C_COMPILER_LAUNCHER=sccache \
                 -DCMAKE_CXX_COMPILER_LAUNCHER=sccache \
                 $extra_cmake_args \
@@ -142,8 +143,6 @@ jobs:
         env:
           LLVM_BUILDDIR: ${{ steps.build-llvm.outputs.llvm-builddir }}
         run: |
-          # Make sure all of LLVM libraries that llvm-config needs are built.
+          # The libclc tests don't have a generated check target so all we can
+          # do is build it.
           ninja -C "$LLVM_BUILDDIR"
-          cmake -G Ninja -S libclc -B libclc-build -DLLVM_DIR="$LLVM_BUILDDIR"/lib/cmake/llvm -DLIBCLC_TARGETS_TO_BUILD="amdgcn--;amdgcn--amdhsa;r600--;nvptx--;nvptx64--;nvptx--nvidiacl;nvptx64--nvidiacl"
-          ninja -C libclc-build
-          ninja -C libclc-build test