[SDK] Refine StageLogPersister handling in SDK

[Warashi]

What this PR does:

• define type sdk.StageLogPersister and replace logpersister.StageLogPersister with it.
• Add graceful shutdown handling in ExecuteStage

Why we need it:

• The Complete method of StageLogPersister is called only in SDK, so hide it from SDK users.
• We have to handle graceful shutdown to implement plugins correctly, but it's difficult for users who don't know the piped behavior. So, I want to do it in SDK.

Which issue(s) this PR fixes:

Part of #5530

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[codecov]

Codecov Report

Attention: Patch coverage is 3.84615% with 25 lines in your changes missing coverage. Please review.

Project coverage is 26.27%. Comparing base (75dedd4) to head (6e93735).
Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/plugin/sdk/deployment.go	0.00%	21 Missing ⚠️
pkg/app/pipedv1/plugin/wait/wait.go	33.33%	2 Missing ⚠️
pkg/plugin/sdk/client.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5588      +/-   ##
==========================================
- Coverage   26.28%   26.27%   -0.01%     
==========================================
  Files         470      470              
  Lines       50353    50372      +19     
==========================================
  Hits        13234    13234              
- Misses      36059    36078      +19     
  Partials     1060     1060              

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[khanhtc1202]

LGTM 👍

[t-kikuc]

Thank you!