docs: fix broken CI badge and outdated links in README

[Pro-Ace-grammer]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

This PR updates the README.md to fix multiple broken links that were providing a poor user experience.

The CI status badge was pointing to an inactive test.yml file; it now points to the active Kubernetes Python Client - Validation workflow.

Outdated bit.ly links for "Client Capabilities" and "Client Support Level" have been replaced with their current official documentation targets.

Which issue(s) this PR fixes:

Fixes #2516

Special notes:

The badge now correctly renders the "passing" status for the validation workflow.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: Pro-Ace-grammer / name: Arslaan Darwajkar (02cd2f6, 6e4d866)

[k8s-ci-robot]

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[Pro-Ace-grammer]

/release-note-none

[yliaog]

why pointing to https://github.com/kubernetes/community/blob/master/contributors/devel/sig-architecture/api-conventions.md ?

[Pro-Ace-grammer]

I replaced the broken bit.ly link because it was returning a 404. I pointed it to the API Conventions as it outlines the standard expectations for client-server interoperability and object metadata. However, if there is a more specific 'Capabilities' matrix or a different internal document you'd prefer I link to, I’m happy to update it!

[yliaog]

why pointing to https://github.com/kubernetes/client-go#compatibility ?

[Pro-Ace-grammer]

Here too I replaced the broken bit.ly link which was returning a 404. I pointed it to the client-go compatibility section as a general reference for Kubernetes client support levels. However, if there is a more appropriate Python-specific compatibility document or a table within this repository you'd prefer I link to, please let me know and I will update it immediately.

[yliaog]

please use
https://github.com/kubernetes/design-proposals-archive/blob/main/api-machinery/csi-new-client-library-procedure.md

[Pro-Ace-grammer]

Thank you for the guidance! I have updated both the 'Client Capabilities' and 'Client Support Level' links to point to the suggested design-proposals-archive link.

[yliaog]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Pro-Ace-grammer, yliaog

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