Use gradle build cache action rather than manual cache usage. (#7944)

.github/workflows/nightly.yml

@@ -19,14 +19,10 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: 3.8
-      - uses: actions/cache@v3
+      - name: Configure gradle
+        uses: gradle/gradle-build-action@v2
         with:
-          path: |
-            ~/.gradle/caches
-            ~/.gradle/wrapper
-          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*', '**/gradle-wrapper.properties') }}
-          restore-keys: |
-            ${{ runner.os }}-gradle-
+          cache-read-only: ${{ github.ref != 'refs/heads/develop' }}
       - name: Install towncrier
         run: |
           python3 -m pip install towncrier