Support MERGE..WHEN NOT MATCHED BY SOURCE on hypertables

[fabriziomello]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.

Project coverage is 77.14%. Comparing base (59f50f2) to head (62ef273).
Report is 559 commits behind head on main.

Files with missing lines	Patch %	Lines
src/import/ht_hypertable_modify.c	83.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7377      +/-   ##
==========================================
- Coverage   80.06%   77.14%   -2.93%     
==========================================
  Files         190      228      +38     
  Lines       37181    42096    +4915     
  Branches     9450    10558    +1108     
==========================================
+ Hits        29770    32473    +2703     
- Misses       2997     5545    +2548     
+ Partials     4414     4078     -336     

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