Generate Python client-go retry wiring

[sttts]

Summary

• apply Kubernetes-specific post-generation patches for sync and async Python clients
• add opt-in client_go_retries and client_go_retry_backoff configuration fields to generated clients
• wire generated GET/HEAD requests to the client-go-compatible retry helpers from client: add Kubernetes-aware retry helpers python#2634
• use the public helper paths kubernetes.utils.retry for sync and kubernetes.aio.utils.retry for AIO

Validation

• dry-ran the new patches against OpenAPI Generator v6.6.0 python-legacy templates
• dry-ran existing downstream Python REST patches after applying the generator retry patches
• ran git diff --check

Depends on kubernetes-client/python#2634.

[kubernetes-prow]

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[yliaog]

thanks for the PR.

#305 (comment) upgrades the openapi generator to v7.24.0, the patches in this PR would need to be reworked after the upgrade. Let's wait a few days for that.

[kubernetes-prow]

PR needs rebase.

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[yliaog]

@sttts could you please rebase? thanks.

[brendandburns]

Also, don't we want this to be updated in the upstream code generator? Instead of patching here?

Also, if we do need patches, I would suggest that we carry the patches in the python client repository, not the gen repository, that's what we do for Java:

https://github.com/kubernetes-client/java/blob/master/.github/workflows/generate.yml#L127

[yliaog]

+1 to what @brendandburns said, better to update the upstream openapi generator.