Feat: support sharding

[Somefive]

Signed-off-by: Yin Da yd219913@alibaba-inc.com

[codecov]

Codecov Report

Base: 90.23% // Head: 90.37% // Increases project coverage by +0.13% 🎉

Coverage data is based on head (bed3541) compared to base (ac89a08).
Patch coverage: 91.76% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #44      +/-   ##
==========================================
+ Coverage   90.23%   90.37%   +0.13%     
==========================================
  Files          52       57       +5     
  Lines        1721     1891     +170     
==========================================
+ Hits         1553     1709     +156     
- Misses        121      134      +13     
- Partials       47       48       +1     

Flag	Coverage Δ
unit-test	90.37% <91.76%> (+0.13%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
util/k8s/patch/patch.go	79.16% <ø> (ø)
util/k8s/namespace.go	96.15% <83.33%> (-3.85%)	⬇️
controller/sharding/scheduler.go	88.18% <88.18%> (ø)
controller/sharding/cache.go	100.00% <100.00%> (ø)
controller/sharding/flags.go	100.00% <100.00%> (ø)
controller/sharding/util.go	100.00% <100.00%> (ø)
controller/sharding/vars.go	100.00% <100.00%> (ø)

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