[FLINK-27387][hive] Hive dialect supports multi-insert statement

[luoyuxia]

What is the purpose of the change

To support multi-insert statement for Hive dialect.

Brief change log

• Construct ModifyOperation separately for each insert fragment in one single multi-insert statement.
• Compose these ModifyOperations to StatementSetOperation.

Verifying this change

The addition test in ...connector-hive/src/test/java/org/apache/flink/connectors/hive/HiveDialectQueryITCase.java#testMultiInsert

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): no
• The public API, i.e., is any changed class annotated with @Public(Evolving): no
• The serializers: no
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
• The S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? N/A

[flinkbot]

CI report:

• 8a2ae3e Azure: SUCCESS

Bot commands

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• @flinkbot run azure re-run the last Azure build

[luoyuxia]

@flinkbot run azure

[luoyuxia]

@flinkbot run azure

[wuchong]

Looks good to me in general. Btw, does it also support EXPLAIN? Could you add a test for it?

[luoyuxia]

Looks good to me in general. Btw, does it also support EXPLAIN? Could you add a test for it?

Now, I add a test for explain in testMultiInsert

[wuchong]

LGTM