Add metric report for thumbup and thumbdown buttons in chat

[chishui]

Description

Whenever users click thumb-up and thumb-down buttons, we emit a click event using usage_collection plugin. The data will be save to kibana index through savedObject.

Things to note:

1. Append a UUID after metric name so that each click event haves their own document and we have a way to aggregate docs within a timeframe.
2. Need to enable this flag usageCollection.uiMetric.enabled: true to enable reporting.

Issues Resolved

#262

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test.
• New functionality has user manual doc added.
• Commits are signed per the DCO using --signoff.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.41%. Comparing base (4f33fa0) to head (f8a1d4d).
Report is 10 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #263      +/-   ##
==========================================
- Coverage   90.34%   89.41%   -0.94%     
==========================================
  Files          59       60       +1     
  Lines        1575     1672      +97     
  Branches      377      412      +35     
==========================================
+ Hits         1423     1495      +72     
- Misses        150      175      +25     
  Partials        2        2              

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