Add trace log for replication lag

[justinlin-linkedin]

Summary

This PR adds trace log for replication lags

Testing Done

No testing needed.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.75%. Comparing base (52ba813) to head (92e93a0).
⚠️ Report is 337 commits behind head on master.

Files with missing lines	Patch %	Lines
...va/com/github/ambry/replication/ReplicaThread.java	0.00%	7 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3192      +/-   ##
============================================
+ Coverage     64.24%   69.75%   +5.50%     
- Complexity    10398    12802    +2404     
============================================
  Files           840      930      +90     
  Lines         71755    79062    +7307     
  Branches       8611     9456     +845     
============================================
+ Hits          46099    55147    +9048     
+ Misses        23004    20963    -2041     
- Partials       2652     2952     +300     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.