Extend CacheRuntime phase 2.5: transform Cache Runtime Spec into pods spec

[xliuqq]

Ⅰ. Describe what this PR does

transform Cache Runtime Spec into master/worker/client pods spec

Ⅱ. Does this pull request fix one issue?

part of #5412 and fix #5877

Ⅲ. List the added test cases (unit test/integration test) if any, please explain if no tests are needed.

unit test

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

RuntimeTieredStore for worker/client and storage for master(ha) not yet resolved

[fluid-e2e-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[gemini-code-assist]

Code Review

This pull request refactors the CacheEngine component transformation and status update logic to be more modular and efficient. It introduces lightweight status tracking using ComponentIdentity and consolidates volume and pod template transformations into shared helper functions. Additionally, it replaces hardcoded labels with constants and significantly expands test coverage. Feedback identifies a bug in worker affinity construction where existing node affinity preferences are overwritten, and a potential issue with duplicate volume names in pod specs due to incomplete tracking of previously added volumes.

[codecov]

Codecov Report

❌ Patch coverage is 79.95546% with 90 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.20%. Comparing base (ed9b7ef) to head (f4f965d).

Files with missing lines	Patch %	Lines
pkg/ddc/cache/engine/transform_volumes.go	61.90%	37 Missing and 3 partials ⚠️
pkg/ddc/cache/engine/transform_common.go	65.62%	22 Missing and 11 partials ⚠️
pkg/ddc/cache/component/daemonset_manager.go	37.50%	4 Missing and 1 partial ⚠️
pkg/ddc/cache/engine/setup.go	0.00%	5 Missing ⚠️
pkg/ddc/cache/engine/transform_client.go	84.21%	2 Missing and 1 partial ⚠️
pkg/ddc/cache/component/statefulset_manager.go	60.00%	2 Missing ⚠️
pkg/ddc/cache/engine/transform_worker.go	98.27%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5888      +/-   ##
==========================================
+ Coverage   61.65%   63.20%   +1.55%     
==========================================
  Files         480      481       +1     
  Lines       32613    32873     +260     
==========================================
+ Hits        20108    20779     +671     
+ Misses      10897    10435     -462     
- Partials     1608     1659      +51     

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[sonarqubecloud]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
14.5% Duplication on New Code

See analysis details on SonarQube Cloud