Refactor Gradle build and test steps

Changed Gradle build and test steps from using actions to explicit commands. This simplifies the workflow configuration and provides more clarity about the commands being executed.

.github/workflows/gradle.yml

@@ -24,12 +24,10 @@ jobs:
         uses: gradle/wrapper-validation-action@v2
       - name: Build with Gradle
         uses: gradle/actions/setup-gradle@v3
-        with:
-          arguments: build
+        run: ./gradlew build
       - name: Run tests
         uses: gradle/actions/setup-gradle@v3
-        with:
-          arguments: test
+        run: ./gradlew test
 
       - name: Upload build reports
         uses: actions/upload-artifact@v4