Allow jumping between canary steps

[myname4423]

Ⅰ. Describe what this PR does

1. Enables "Jump" between canary release steps: One can patch the status.CanaryStatus.NextStepIndex to jump between steps
2. Enable patching the traffic strategy of current step
3. Introduces a ReleaseManager interface: The canary ReleaseManager has already implemented this interface, paving the way for easy integration of the blue-green release strategy in the future.
4. Abstracts Strategy-Specific Details: Replaces direct references to canary status and strategy with strategy-agnostic functions. This enhancement lays the groundwork for supporting future blue-green deployments more effectively.

Ⅱ. Does this pull request fix one issue?

Ⅲ. Special notes for reviews

This PR is based on the previous one (update api for future bluegreen), #214
It is advisable to review this PR after the merging of its predecessor.

[kruise-bot]

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[codecov]

Codecov Report

Attention: Patch coverage is 38.00000% with 124 lines in your changes missing coverage. Please review.

Project coverage is 43.19%. Comparing base (07c1731) to head (74b7498).
Report is 3 commits behind head on master.

❗ Current head 74b7498 differs from pull request most recent head fccb995

Please upload reports for the commit fccb995 to get more accurate results.

Files	Patch %	Lines
pkg/controller/rollout/rollout_progressing.go	50.00%	34 Missing and 10 partials ⚠️
pkg/controller/rollout/rollout_status.go	19.14%	38 Missing ⚠️
pkg/controller/rollout/rollout_canary.go	27.02%	25 Missing and 2 partials ⚠️
...g/controller/batchrelease/batchrelease_executor.go	56.25%	7 Missing ⚠️
pkg/util/rollout_utils.go	0.00%	7 Missing ⚠️
pkg/util/controller_finder.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #216      +/-   ##
==========================================
- Coverage   43.63%   43.19%   -0.45%     
==========================================
  Files          52       52              
  Lines        5681     5795     +114     
==========================================
+ Hits         2479     2503      +24     
- Misses       2778     2859      +81     
- Partials      424      433       +9     

Flag	Coverage Δ
unittests	43.19% <38.00%> (-0.45%)	⬇️

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[kruise-bot]

@myname4423: PR needs rebase.

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