chore: refactor Watch API flags

[miparnisari]

Description

Avoid having to store each individual configuration for Watch API inside every datastore implementation.

Important files to review:

• pkg/datastore/datastore.go

Testing

References

Closes #2861

[codecov]

Codecov Report

❌ Patch coverage is 84.37500% with 40 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.39%. Comparing base (0ab9618) to head (5809bb1).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/datastore/datastore.go	64.87%	24 Missing and 2 partials ⚠️
...nal/datastore/proxy/schemacaching/watchingcache.go	64.71%	5 Missing and 1 partial ⚠️
internal/services/v1/watch.go	82.36%	2 Missing and 1 partial ⚠️
internal/datastore/proxy/counting.go	0.00%	2 Missing ⚠️
internal/datastore/proxy/singleflight.go	0.00%	2 Missing ⚠️
pkg/cmd/testserver/testserver.go	0.00%	1 Missing ⚠️

❌ Your project check has failed because the head coverage (74.39%) is below the target coverage (75.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2867      +/-   ##
==========================================
- Coverage   74.44%   74.39%   -0.04%     
==========================================
  Files         484      484              
  Lines       57702    57730      +28     
==========================================
- Hits        42948    42942       -6     
- Misses      11744    11779      +35     
+ Partials     3010     3009       -1     

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