Introduce MergeAndAppendTo for ProfilesDictionary

[dmathieu]

Description

This introduces MoveAndAppendTo to pprofile.ProfilesDictionary.
While ProfilesDictionary isn't a slice, it only holds slices, and moving/appending them all is needed for #13106.

[bogdandrutu]

Name does not sound clear since merging has some append connotations

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.26%. Comparing base (0f0e1f6) to head (18eff55).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #13138   +/-   ##
=======================================
  Coverage   91.26%   91.26%           
=======================================
  Files         508      509    +1     
  Lines       28747    28756    +9     
=======================================
+ Hits        26235    26244    +9     
  Misses       1994     1994           
  Partials      518      518           

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[dmathieu]

I reused the method name from slices (eg: AttributeTableSlice).
But I'm happy to use another one. Maybe just Merge?

[bogdandrutu]

But the idea there is Move source (meaning memory is moved instead of copy) and append that to the destination.

[dmathieu]

Sure. MoveTo is already taken though. What's your suggestion?

[dmathieu]

Upon reflexion, I don't think this is the right approach.
It will make ensuring uniqueness of entries in each table quite difficult.

I'll open other PRs using another approach with the FromAttributeIndices and PutAttribute methods.