[FLINK-34202][python] Optimize Python nightly CI time

[HuangXingBo]

What is the purpose of the change

This pull request will select random python version to run to optimize Python nightly CI time

Brief change log

• select random python version to run

Verifying this change

nightly tests

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:

• 3a04868 Azure: SUCCESS

Bot commands

The @flinkbot bot supports the following commands:

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

[HuangXingBo]

https://dev.azure.com/hxbks2ks/FLINK-TEST/_build/results?buildId=2219&view=logs&j=fba17979-6d2e-591d-72f1-97cf42797c11&t=727942b6-6137-54f7-1ef9-e66e706ea068 - random select python 3.10
https://dev.azure.com/apache-flink/apache-flink/_build/results?buildId=57587&view=logs&j=9cada3cb-c1d3-5621-16da-0f718fb86602&t=c67e71ed-6451-5d26-8920-5a8cf9651901 - random select python 3.11