Remove continuous_agg_migrate_plan tables

[svenklemm]

These are left over from when the procedure to convert continuous
aggregate from partial format to new format were removed.

Disable-check: force-changelog-file

[github-actions]

@antekresic, @kpan2034: please review this pull request.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.78%. Comparing base (3a8a16e) to head (321dd35).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9212      +/-   ##
==========================================
+ Coverage   85.65%   85.78%   +0.12%     
==========================================
  Files         245      245              
  Lines       47966    47935      -31     
  Branches    10709    10708       -1     
==========================================
+ Hits        41085    41119      +34     
- Misses       3524     3526       +2     
+ Partials     3357     3290      -67     

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[natalya-aksman]

Have to check that it won't break OSM: @gayyappan

[gayyappan]

Have to check that it won't break OSM: @gayyappan

Thanks for the callout. This is not a problem for OSM.

[fabriziomello]

I didn't removed this table to keep an execution history of the migration for customer. I think it should be removed in some releases in the future.

[svenklemm]

I didn't removed this table to keep an execution history of the migration for customer. I think it should be removed in some releases in the future.

What is the useful content in this table that we need to keep it beyond 2.26?

[fabriziomello]

I didn't removed this table to keep an execution history of the migration for customer. I think it should be removed in some releases in the future.

What is the useful content in this table that we need to keep it beyond 2.26?

CAgg migration execution history.

[svenklemm]

I didn't removed this table to keep an execution history of the migration for customer. I think it should be removed in some releases in the future.

What is the useful content in this table that we need to keep it beyond 2.26?

CAgg migration execution history.

This is just the log and no longer relevant so i dont understand why we would need to keep it any longer cause any migrations happened months before the table gets removed.