fix(clusters): refine EKS Anywhere credentials and creation UI

[pggb25]

• filter credentials list/new credential to EKS Anywhere types in EKS Anywhere flow
• hide Kubernetes version badge on PARTIALLY_MANAGED cluster cards
• keep eu-west-3 as default but allow region selection for EKS Anywhere creation

Summary

• filter credentials list/new credential to EKS Anywhere types in EKS Anywhere flow
• hide Kubernetes version badge on PARTIALLY_MANAGED cluster cards
• keep eu-west-3 as default but allow region selection for EKS Anywhere creation

Issue:

Screenshots / Recordings

Testing

• Changes tested locally in the relevant Console's pages and Storybooks
• yarn test or yarn test -u (if you need to regenerate snapshots)
• yarn format
• yarn lint

PR Checklist

• I followed naming, styling, and TypeScript rules (see .cursor/rules)
• I performed a self-review (diff inspected, dead code removed)
• I titled the PR using Conventional Commits with a scope when possible (e.g. feat(service): add new Terraform service) - required for semantic-release
• I only kept necessary comments, written in English (watch for useless AI comments)
• I involved a designer to validate UI changes if I am not a designer
• I covered new business logic with tests (unit)
• I confirmed CI is green (Codecov red can be accepted)
• I reviewed and executed locally any AI-assisted code

[codecov]

Codecov Report

❌ Patch coverage is 68.00000% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 44.88%. Comparing base (4e5a3d8) to head (58848de).
⚠️ Report is 2 commits behind head on new-navigation.

Files with missing lines	Patch %	Lines
...eature/src/lib/cluster-actions/cluster-actions.tsx	44.44%	4 Missing and 1 partial ⚠️
...luster-creation-flow/step-general/step-general.tsx	0.00%	1 Missing ⚠️
...luster-creation-flow/step-summary/step-summary.tsx	83.33%	0 Missing and 1 partial ⚠️
...dentials-settings/cluster-credentials-settings.tsx	85.71%	1 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                 @@
##           new-navigation    #2602      +/-   ##
==================================================
+ Coverage           44.79%   44.88%   +0.09%     
==================================================
  Files                1145      797     -348     
  Lines               23878    19092    -4786     
  Branches             6980     5650    -1330     
==================================================
- Hits                10696     8570    -2126     
+ Misses              11280     8991    -2289     
+ Partials             1902     1531     -371     

Flag	Coverage Δ
unittests	44.88% <68.00%> (+0.09%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.