Feat: add get id in monitor context

[FogDong]

Signed-off-by: FogDong dongtianxin.tx@alibaba-inc.com

[codecov]

Codecov Report

Base: 90.88% // Head: 90.90% // Increases project coverage by +0.02% 🎉

Coverage data is based on head (302624c) compared to base (351ed4d).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #13      +/-   ##
==========================================
+ Coverage   90.88%   90.90%   +0.02%     
==========================================
  Files          14       15       +1     
  Lines         351      352       +1     
==========================================
+ Hits          319      320       +1     
  Misses         19       19              
  Partials       13       13              

Flag	Coverage Δ
unit-test	90.90% <100.00%> (+0.02%)	⬆️

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

Impacted Files	Coverage Δ
monitor/context/context.go	100.00% <100.00%> (ø)
util/rand/strings.go	100.00% <0.00%> (ø)
controller/client/monitor_client.go	100.00% <0.00%> (ø)
multicluster/utils.go	100.00% <0.00%> (ø)

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