move metrics config to a separated section

[changweige]

We are pursuing a more fine-grained configuration section for metrcis, e.g. scrape interval, etc

Signed-off-by: Changwei Ge gechangwei@bytedance.com

[codecov-commenter]

Codecov Report

Base: 28.99% // Head: 28.97% // Decreases project coverage by -0.03% ⚠️

Coverage data is based on head (04309e3) compared to base (69c9c6b).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #335      +/-   ##
==========================================
- Coverage   28.99%   28.97%   -0.03%     
==========================================
  Files          37       37              
  Lines        3704     3707       +3     
==========================================
  Hits         1074     1074              
- Misses       2510     2513       +3     
  Partials      120      120              

Impacted Files	Coverage Δ
config/config.go	9.00% <0.00%> (-0.28%)	⬇️

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