[FLINK-34487][ci] Adds Python Wheels nightly GHA workflow for 1.18

[morazow]

What is the purpose of the change

Integrates Python Wheels build into the GitHub Actions (GHA) nightly workflow for 1.18 releases.

Brief change log

• Adds Python Wheels GHA workflow, template.python-wheels-ci.yml
• Integrates the Python Wheels workflow to the nightly GHA workflow
• Verifying this change
• This changes does not change code.

But the successful nightly GHA run should verify the change.

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:

• 277a69d Azure: SUCCESS

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