WIP explicitly skip-include_stats in ReloadSchema

[shlomi-noach]

Description

Experimental: we add the ability to skip include stats in ReloadSchema by introducing SkipIncludeStats field in ReloadSchemaRequest. The only one to actually skip stats is the Online DDL executor.

Related Issue(s)

Checklist

• "Backport to:" labels have been added if this change should be back-ported to release branches
• If this change is to be back-ported to previous releases, a justification is included in the PR description
• Tests were added or are not required
• Did the new or modified tests pass consistently locally and on CI?
• Documentation was added or is not required

Deployment Notes

[vitess-bot]

Review Checklist

Hello reviewers! 👋 Please follow this checklist when reviewing this Pull Request.

General

• Ensure that the Pull Request has a descriptive title.
• Ensure there is a link to an issue (except for internal cleanup and flaky test fixes), new features should have an RFC that documents use cases and test cases.

Tests

• Bug fixes should have at least one unit or end-to-end test, enhancement and new features should have a sufficient number of tests.

Documentation

• Apply the release notes (needs details) label if users need to know about this change.
• New features should be documented.
• There should be some code comments as to why things are implemented the way they are.
• There should be a comment at the top of each new or modified test to explain what the test does.

New flags

• Is this flag really necessary?
• Flag names must be clear and intuitive, use dashes (-), and have a clear help text.

If a workflow is added or modified:

• Each item in Jobs should be named in order to mark it as required.
• If the workflow needs to be marked as required, the maintainer team must be notified.

Backward compatibility

• Protobuf changes should be wire-compatible.
• Changes to _vt tables and RPCs need to be backward compatible.
• RPC changes should be compatible with vitess-operator
• If a flag is removed, then it should also be removed from vitess-operator and arewefastyet, if used there.
• vtctl command output order should be stable and awk-able.

[codecov]

Codecov Report

Attention: Patch coverage is 44.82759% with 16 lines in your changes missing coverage. Please review.

Project coverage is 67.15%. Comparing base (4550640) to head (7694c42).
Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
go/vt/vttablet/tabletmanager/rpc_schema.go	0.00%	7 Missing ⚠️
go/vt/vtcombo/tablet_map.go	0.00%	2 Missing ⚠️
go/vt/vttablet/tabletmanager/rpc_query.go	0.00%	2 Missing ⚠️
go/vt/vttablet/tabletserver/tabletserver.go	0.00%	2 Missing ⚠️
go/vt/vttablet/faketmclient/fake_client.go	0.00%	1 Missing ⚠️
go/vt/vttablet/onlineddl/executor.go	0.00%	1 Missing ⚠️
go/vt/vttablet/tabletservermock/controller.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #17101      +/-   ##
==========================================
- Coverage   67.15%   67.15%   -0.01%     
==========================================
  Files        1571     1571              
  Lines      252250   252251       +1     
==========================================
- Hits       169409   169401       -8     
- Misses      82841    82850       +9     

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

[shlomi-noach]

Put on ice. #17118 is hopefully good for now.