Parallelize github actions workflow for Java8 builds

PiperOrigin-RevId: 933307920

Author: l46kok

.github/workflows/workflow.yml

@@ -15,13 +15,13 @@ concurrency:
     cancel-in-progress: true
 
 jobs:
-  Static-Checks:
+  Bazel-Build-Java8:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
       - run: echo "🎉 The job was automatically triggered by a ${{ github.event_name }} event."
       - run: echo "🐧 Job is running on a ${{ runner.os }} server!"
-      - run: echo "🔎 The name of your branch is ${GITHUB_REF} and your repository is ${{ github.repository }}."
+      - run: echo "🔎 The name of your branch is ${{ github.ref }} and your repository is ${{ github.repository }}."
       - name: Check out repository code
         uses: actions/checkout@v6
       - name: Setup Bazel
@@ -33,13 +33,18 @@ jobs:
             disk-cache: ${{ github.workflow }}
             # Share repository cache between workflows.
             repository-cache: true
-            # Never write to the cache, strictly read-only
-            cache-save: false
+            # Prevent PRs from polluting cache
+            cache-save: ${{ github.event_name != 'pull_request' }}
+      - name: Bazel Output Version
+        run: bazelisk --version
+      - name: Java 8 Build
+        run: bazel build ... --java_language_version=8 --java_runtime_version=8 --build_tag_filters=-conformance_maven
       - name: Unwanted Dependencies
         run: .github/workflows/unwanted_deps.sh
       - name: Cross-artifact Duplicate Classes Check
         run: .github/workflows/cross_artifact_dependencies_check.sh
       - run: echo "🍏 This job's status is ${{ job.status }}."
+
   Bazel-Tests:
     runs-on: ubuntu-latest
     timeout-minutes: 30
@@ -62,8 +67,6 @@ jobs:
             cache-save: ${{ github.event_name != 'pull_request' }}
       - name: Bazel Output Version
         run: bazelisk --version
-      - name: Java 8 Build
-        run: bazel build ... --java_language_version=8 --java_runtime_version=8 --build_tag_filters=-conformance_maven
       - name: Bazel Test
         # Exclude codelab exercises as they are intentionally made to fail
         # Exclude maven conformance tests. They are only executed when there's version change.