workflows/release-binaries: Disable LTO/PGO for testing macOS job in PRs (#165801)

When a PR is submitted the macos-14 workflow will run with LTO/PGO
disabled. This makes it possible to run the workflow on the free runners
with the six hour timeout and will allow us to test the workflow on pull
requests.

Author: tstellar

.github/workflows/release-binaries.yml

@@ -138,7 +138,6 @@ jobs:
           target_cmake_flags="$target_cmake_flags -DLLVM_RELEASE_ENABLE_LTO=OFF"
         fi
 
-        echo "target-cmake-flags=$target_cmake_flags" >> $GITHUB_OUTPUT
         case "${{ inputs.runs-on }}" in
           ubuntu-22.04*)
             build_runs_on="depot-${{ inputs.runs-on }}-16"
@@ -157,6 +156,23 @@ jobs:
             build_runs_on=$test_runs_on
             ;;
         esac
+
+        case "$build_runs_on" in
+          # These runners cannot build the full release package faster than
+          # the 6 hours timeout limit, so we need to use a configuration
+          # that builds more quickly.
+          macos-14)
+            bootstrap_prefix="BOOTSTRAP"
+            target_cmake_flags="$target_cmake_flags -DLLVM_RELEASE_ENABLE_LTO=OFF -DLLVM_RELEASE_ENABLE_PGO=OFF"
+            ;;
+          *)
+            bootstrap_prefix="BOOTSTRAP_BOOTSTRAP"
+            ;;
+        esac
+
+        target_cmake_flags="$target_cmake_flags -D${bootstrap_prefix}_CPACK_PACKAGE_FILE_NAME=$release_binary_basename"
+
+        echo "target-cmake-flags=$target_cmake_flags" >> $GITHUB_OUTPUT
         echo "build-runs-on=$build_runs_on" >> $GITHUB_OUTPUT
         echo "test-runs-on=$test_runs_on" >> $GITHUB_OUTPUT
 
@@ -200,8 +216,7 @@ jobs:
         # so we need to set some extra cmake flags to disable this.
         cmake -G Ninja -S llvm -B ${{ steps.setup-stage.outputs.build-prefix }}/build \
             ${{ needs.prepare.outputs.target-cmake-flags }} \
-            -C clang/cmake/caches/Release.cmake \
-            -DBOOTSTRAP_BOOTSTRAP_CPACK_PACKAGE_FILE_NAME="${{ needs.prepare.outputs.release-binary-basename }}"
+            -C clang/cmake/caches/Release.cmake
 
     - name: Build
       shell: bash