LookupVindex: Implement internalize command for lookup vindexes

[beingnoble03]

Description

This PR

• Implements the internalize and complete command for lookup vindexes
• Also, modifies the externalize command where we stop the workflow and mark it as frozen instead of deleting it.
• complete command checks if the lookup vindex is externalized, and if it has an owner, it deletes the workflow.
• internalize command starts the frozen streams (if there's an owner) and sets the write_only vindex param back to true (which was deleted when lookup vindex was externalized.)

Related Issue(s)

• Fixes Feature Request: LookupVindex has no internalize command (equivalent to ReverseTraffic) #15985

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

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• vtctl command output order should be stable and awk-able.

[codecov]

Codecov Report

Attention: Patch coverage is 50.99602% with 123 lines in your changes missing coverage. Please review.

Project coverage is 67.63%. Comparing base (9383943) to head (128198d).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
.../command/vreplication/lookupvindex/lookupvindex.go	12.28%	50 Missing ⚠️
go/vt/vtctl/workflow/server.go	77.56%	35 Missing ⚠️
go/vt/vtctl/grpcvtctldserver/server.go	0.00%	24 Missing ⚠️
go/vt/vtctl/grpcvtctldclient/client_gen.go	0.00%	10 Missing ⚠️
go/vt/vtctl/localvtctldclient/client_gen.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #17429      +/-   ##
==========================================
- Coverage   67.67%   67.63%   -0.04%     
==========================================
  Files        1583     1584       +1     
  Lines      254363   254624     +261     
==========================================
+ Hits       172140   172216      +76     
- Misses      82223    82408     +185     

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