Remove time_bucket_ng

[fabriziomello]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 55.55556% with 4 lines in your changes missing coverage. Please review.

Project coverage is 81.67%. Comparing base (59f50f2) to head (379d44f).
Report is 1028 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ts_catalog/continuous_agg.c	42.85%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6968      +/-   ##
==========================================
+ Coverage   80.06%   81.67%   +1.60%     
==========================================
  Files         190      199       +9     
  Lines       37181    36649     -532     
  Branches     9450     9565     +115     
==========================================
+ Hits        29770    29932     +162     
+ Misses       2997     2878     -119     
+ Partials     4414     3839     -575     

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