[FLINK-29817][python] Fix the metadata in PyFlink requirements

[HuangXingBo]

What is the purpose of the change

This pull request will fix the metadata in PyFlink requirements

Brief change log

• Update the metadata of install_requirement in setup.py

Verifying this change

This change added tests and can be verified as follows:

• Run the pkginfo -f requires_dist *.whl to test manually

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)
• If yes, how is the feature documented? (not applicable)

[flinkbot]

CI report:

• b5aa3ef Azure: SUCCESS

Bot commands

The @flinkbot bot supports the following commands:

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

[dianfu]

Don't forget to rebuild the doc after this PR merged.