PMM-12895 Add metrics resolutions configuration to agents

[artemgavrilov]

PMM-12895

Link to the Feature Build: SUBMODULES-3578

If this PR adds or removes or alters one or more API endpoints, please review and add or update the relevant API documents as well:

• [ ] API Docs updated

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 43.29%. Comparing base (09f3823) to head (0261fd9).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2882      +/-   ##
==========================================
- Coverage   43.34%   43.29%   -0.06%     
==========================================
  Files         399      399              
  Lines       41516    41429      -87     
==========================================
- Hits        17996    17937      -59     
+ Misses      21514    21488      -26     
+ Partials     2006     2004       -2     

Flag	Coverage Δ
admin	11.61% <ø> (-0.06%)	:arrow_down:
agent	52.83% <ø> (ø)
vmproxy	66.66% <ø> (ø)

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[artemgavrilov]

LGTM, can we add a new test to scrape_configs_test with custom metrics resolution?

Functions from scrape_configs.go accept metrics resolutions as a parameter, so it doesn't matter from where it comes.