decode metric list according to metric name whether is aggregator metric

[luomingmeng]

What type of PR is this?

Bug fixes

What this PR does / why we need it:

fix aggregator metric

Which issue(s) this PR fixes:

Special notes for your reviewer:

[codecov]

Codecov Report

Attention: 14 lines in your changes are missing coverage. Please review.

Comparison is base (5652340) 53.17% compared to head (aef9950) 53.30%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #317      +/-   ##
==========================================
+ Coverage   53.17%   53.30%   +0.13%     
==========================================
  Files         406      408       +2     
  Lines       43980    44071      +91     
==========================================
+ Hits        23386    23494     +108     
+ Misses      18006    17986      -20     
- Partials     2588     2591       +3     

Flag	Coverage Δ
unittest	53.30% <80.82%> (+0.13%)	⬆️

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

Files	Coverage Δ
pkg/custom-metric/store/data/cache.go	94.54% <100.00%> (+13.44%)	⬆️
pkg/custom-metric/store/data/internal.go	86.60% <100.00%> (+7.47%)	⬆️
pkg/custom-metric/store/local/local_store.go	69.08% <100.00%> (ø)
pkg/custom-metric/store/remote/remote_store.go	77.15% <100.00%> (ø)
pkg/custom-metric/store/data/types/aggragated.go	73.77% <89.65%> (+26.04%)	⬆️
pkg/custom-metric/store/data/types/util.go	44.00% <38.88%> (+0.25%)	⬆️

... and 18 files with indirect coverage changes

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