[FLINK-36244] Remove queryable state

[Zakelly]

What is the purpose of the change

Queryable State is deprecated in 1.18, and this PR removes it in 2.0.

Brief change log

• Remove any deprecated APIs, tests and distribution of the QS.
• Remove the runtime of QS, including:
  • The proxy, client and kv service
  • The KvStateRegistry, which collects all kv state information to JM. This involves many files.
  • The related RPC part of JM or scheduler

Verifying this change

This change is a code cleanup without any test coverage.

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): yes
• The serializers: yes
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: yes
• 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:

• 94bf65488354394eb23529e313e4ca15878cbb75 Azure: SUCCESS

Bot commands

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

[github-actions[bot]]

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[github-actions[bot]]

This PR has been closed since it has not had any activity in 120 days. If you feel like this was a mistake, or you would like to continue working on it, please feel free to re-open the PR and ask for a review.