[FLINK-32300][jdbc-driver] Support get object for result set

[FangYongs]

What is the purpose of the change

Support get object for result and support map data

Brief change log

• Support get object for FlinkResultSet
• Parse nest map result data
• Support getUpdataCount for ddl which is used by beeline

Verifying this change

This change added tests and can be verified as follows:

• Added test case for getObject in FlinkResultSetTest
• Added test case for getUpdateCount in FlinkStatementTest

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

• Dependencies (does it add or upgrade a dependency): (yes / no) no
• The public API, i.e., is any changed class annotated with @Public(Evolving): (yes / no) no
• The serializers: (yes / no / don't know) no
• The runtime per-record code paths (performance sensitive): (yes / no / don't know) no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / no / don't know) no
• The S3 file system connector: (yes / no / don't know) no

Documentation

• Does this pull request introduce a new feature? (yes / no) no
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)

[FangYongs]

@libenchao I have split the main modification from #22583, please help to review this PR when you are free, thanks.

[flinkbot]

CI report:

• 14b24bc Azure: SUCCESS

Bot commands

The @flinkbot bot supports the following commands:

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

[libenchao]

@FangYongs Thanks for your PR, generally looks good, I only left some minor comments.

Besides, what do you think of changing commit message to "Support getObject for FlinkResultSet"?

[libenchao]

+1, merging.