Add document for force-sync-by-replace annotation

[Warashi]

What this PR does / why we need it:

Add documentation of force-sync-by-replace annotation.

Which issue(s) this PR fixes:

Fixes #5174
Follows #5175

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 22.90%. Comparing base (e9dd4c5) to head (569baac).
Report is 25 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5179   +/-   ##
=======================================
  Coverage   22.90%   22.90%           
=======================================
  Files         416      416           
  Lines       44690    44690           
=======================================
  Hits        10238    10238           
  Misses      33660    33660           
  Partials      792      792           

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[t-kikuc]

Let's merge this after releasing #5175.

because users cannot use the annotation in v0.48.x yet.

[khanhtc1202]

👍