[FLINK-38819] Add debug logs for serialisation errors

[vsantwana]

What is the purpose of the change

The pull request logs deserialisation errors as debug logs when ignoreParseErrors is set to true.

Brief change log

(for example:)

• Logs a debug error for deserialisation errors

Verifying this change

Please make sure both new and modified tests in this PR follow the conventions for tests defined in our code quality guide.

This change added tests and can be verified as follows:

• Added test that validate that when there is a deserialisation error, a debug log is logged

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

[flinkbot]

CI report:

• e51e5b3 Azure: FAILURE

Bot commands

The @flinkbot bot supports the following commands:

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

[RocMarshal]

Thanks for the improvement.

Left a few of comments.
PTAL~

[vsantwana]

Thanks @RocMarshal for the review. I have addressed the comments. PTAL!

[vsantwana]

@flinkbot run azure

[davidradl]

nit: the IOException is the same as the debug content - can we use the same variable?

[davidradl]

could you add a test case for fail on missing as well please. This also comes out of JsonParserToRowDataConverters as a JsonParseException.