fix gradle test workflow

Author: wing328

.github/workflows/gradle-plugin-tests.yaml

@@ -34,12 +34,22 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-test-gradle-plugin-${{ env.cache-name }}-
             ${{ runner.os }}-test-gradle-plugin-
-      - name: Run tests
+      - name: mvn clean install
+        run: |
+          ./mvnw clean --no-snapshot-updates --batch-mode --quiet install -DskipTests -Dorg.slf4j.simpleLogger.defaultLogLevel=error
+      - name: Run tests with wrapper
         env:
           GRADLE_ENTERPRISE_ACCESS_KEY: ${{ secrets.GRADLE_ENTERPRISE_ACCESS_KEY }}
         run: |
-          ./mvnw clean --no-snapshot-updates --batch-mode --quiet install -DskipTests -Dorg.slf4j.simpleLogger.defaultLogLevel=error
           (cd modules/openapi-generator-gradle-plugin/samples/local-spec && ./gradlew buildGoSdk) # using gradle-6.8.3 via wrapper
           (cd modules/openapi-generator-gradle-plugin/samples/local-spec && ./gradlew openApiGenerate)
           (cd modules/openapi-generator-gradle-plugin/samples/local-spec && ./gradlew buildDotnetSdk)
+      - name: Setup Gradle
+        uses: gradle/gradle-build-action@v3
+        with:
+          gradle-version: '8.14.3'
+      - name: Run tests without wrapper
+        env:
+          GRADLE_ENTERPRISE_ACCESS_KEY: ${{ secrets.GRADLE_ENTERPRISE_ACCESS_KEY }}
+        run: |
           (cd modules/openapi-generator-gradle-plugin/samples/local-spec && gradle buildJavaResttemplateSdk) # not using gradle wrapper