stateful spd baseline based on shard

[ddjjia]

What type of PR is this?

What this PR does / why we need it:

stateful spd baseline based on shard

Which issue(s) this PR fixes:

Special notes for your reviewer:

[codecov]

Codecov Report

❌ Patch coverage is 43.05556% with 41 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.04%. Comparing base (39dd1d5) to head (9083c6c).
⚠️ Report is 21 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/util/spd_baseline.go	36.36%	26 Missing and 2 partials ⚠️
pkg/controller/spd/spd_baseline.go	50.00%	8 Missing and 3 partials ⚠️
pkg/util/spd.go	0.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1028      +/-   ##
==========================================
+ Coverage   59.85%   60.04%   +0.19%     
==========================================
  Files         689      690       +1     
  Lines       65082    65169      +87     
==========================================
+ Hits        38957    39133     +176     
+ Misses      21666    21583      -83     
+ Partials     4459     4453       -6     

Flag	Coverage Δ
unittest	60.04% <43.05%> (+0.19%)	⬆️

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