[FLINK-5279] Print state name and type in error message when trying to access keyed state in non-keyed operator

[Zakelly]

What is the purpose of the change

Improve the error message when trying to access keyed state in non-keyed operator, printing the state name and state type. It is more convenient for user to identify the problem.

Brief change log

Modify the error message and insert the state name and state type.

Verifying this change

This change is a trivial rework, and the new error message can be validated by CoBroadcastWithNonKeyedOperatorTest

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

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

Documentation

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

[flinkbot]

CI report:

• a9ed979 Azure: SUCCESS

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[masteryhx]

Thanks for the pr. LGTM.