[FLINK-34239][core] Add copy() method for SerializerConfig

[kumar-mallikarjuna]

What is the purpose of the change

org.apache.flink.table.catalog.DataTypeFactoryImpl#createSerializerConfig is currently manually making a copy of a SerializerConfig object. This is cumbersome and error-prone. This change moves this copying logic inside a copy method in SerializerConfig(Impl).

Brief change log

• A copy method is introduced in SerializerConfig and SerializerConfigImpl.
• DataTypeFactoryImpl#createSerializerExecutionConfig reuses this method.

Verifying this change

This change added tests and can be verified as follows:

• Added a unit test for SerializerConfigImply.copy()

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

• Dependencies (no)
• The public API, i.e., is any changed class annotated with @Public(Evolving): (no)
• The serializers: (don't know - changes the underlying implementation but no functional change to the serializers)
• 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? (not applicable)

[flinkbot]

CI report:

• dbcf20e77ee17d5a7954ed1d4d2bd65caf8752b0 UNKNOWN
• c6cc76501f2975282d4915de8a9b2d5f857e0e63 Azure: SUCCESS

Bot commands

The @flinkbot bot supports the following commands:

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

[X-czh]

@kumar-mallikarjuna Thanks for the contribution. LGTM except for two minor comments, PTAL.

[kumar-mallikarjuna]

@X-czh , thanks for reviewing. I've updated the PR.

[X-czh]

Pinging @FangYongs and @reswqa. Could you help take a look when you have time?

[kumar-mallikarjuna]

Hi @reswqa , I've rebased the branch. Thanks!

[reswqa]

@kumar-mallikarjuna Thanks for the rebase, could you squash these to some meaningful commits? I will merge this PR then.

[kumar-mallikarjuna]

Done, @reswqa .

[reswqa]

Sorry for the delay, I shall merge this after CI green(A few days ago, there was a problem with CI pipelline, which has been in the UNKNOWN state. I rebase the master to re-trigger).

[kumar-mallikarjuna]

Thanks @reswqa !