Updated flink 1.8 -> 1.17. Added smoke tests for Flink (#9046)

.github/workflows/jvm_tests.yml

@@ -40,7 +40,7 @@ jobs:
         key: ${{ runner.os }}-m2-${{ hashFiles('./jvm-packages/pom.xml') }}
         restore-keys: ${{ runner.os }}-m2-${{ hashFiles('./jvm-packages/pom.xml') }}
 
-    - name: Test XGBoost4J
+    - name: Test XGBoost4J (Core)
       run: |
         cd jvm-packages
         mvn test -B -pl :xgboost4j_2.12
@@ -67,7 +67,7 @@ jobs:
         AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY_IAM_S3_UPLOADER }}
 
 
-    - name: Test XGBoost4J-Spark
+    - name: Test XGBoost4J (Core, Spark, Examples)
       run: |
         rm -rfv build/
         cd jvm-packages