add petstore testsin groovy workflow

Author: wing328

.github/workflows/samples-groovy.yaml

@@ -41,6 +41,6 @@ jobs:
           gradle-version: ${{ env.GRADLE_VERSION }}
           build-root-directory: ${{ matrix.sample }}
           arguments: wrapper
-      - name: Build
+      - name: Build & Test
         working-directory: ${{ matrix.sample }}
-        run: ./gradlew build -x test
+        run: ./gradlew build

samples/client/petstore/groovy/.openapi-generator-ignore

@@ -21,3 +21,6 @@
 #docs/*.md
 # Then explicitly reverse the ignore rule for a single file:
 #!docs/README.md
+#
+#
+#