feat: select Registry resources in cluster forms

[lixd]

What type of PR is this?

/kind feature
/kind api-change

What this PR does / why we need it:

This PR updates cluster creation, template creation, upgrade, confirmation, and detail views for the Registry-resource image model introduced by kubeclipper/kubeclipper#975.

• replaces the free-text image repository input with a select containing configured Registry resources;
• submits the selected Registry resource name as imageRegistry;
• displays options as name (scheme://host) while keeping the resource name as the value;
• adds explicit labels and help text explaining that the field selects an existing Registry resource;
• updates confirmation, detail, mapper, defaults, and English/Chinese locale strings.

Which issue(s) this PR fixes:

Related to kubeclipper/kubeclipper#973

Special notes for reviewers:

Backend PR: https://github.com/kubeclipper/kubeclipper/pull/975

Validation performed:
- yarn build
- deployed dist to sh-dev-3 and verified the cluster-create form through an SSH tunnel
- selected image-repo and verified that the backend stored imageRegistry: image-repo
- completed a real cluster creation using the selected Registry resource

Does this PR introduced a user-facing change?

Cluster image configuration now selects an existing Registry resource instead of accepting a free-text image repository.

Additional documentation, usage docs, etc.:

- [Other doc]: https://github.com/kubeclipper/kubeclipper/pull/975

[gemini-code-assist]

Caution

The consumer version of Gemini Code Assist on GitHub has been sunset. All code review activity has officially ceased.

[lixd]

/lgtm

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.30%. Comparing base (c8ec5fe) to head (ab9484f).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

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  Coverage   47.30%   47.30%           
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  Files           7        7           
  Lines         613      613           
  Branches      176      176           
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  Hits          290      290           
  Misses        250      250           
  Partials       73       73           

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