introduce stopAndRemoveContainer to share logic scaling down

[ndeloof]

What I did
introduced stopAndRemoveContainer to share logic scaling down and removing container. To be used both by down and convergence.

Related issue
fixes #11391

(not mandatory) A picture of a cute animal, if possible in relation to what you did

[codecov]

Codecov Report

Attention: 8 lines in your changes are missing coverage. Please review.

Comparison is base (143ac0f) 56.71% compared to head (0ef3601) 56.57%.

Files	Patch %	Lines
pkg/compose/down.go	68.18%	5 Missing and 2 partials ⚠️
pkg/compose/create.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #11393      +/-   ##
==========================================
- Coverage   56.71%   56.57%   -0.15%     
==========================================
  Files         136      136              
  Lines       11547    11544       -3     
==========================================
- Hits         6549     6531      -18     
- Misses       4374     4388      +14     
- Partials      624      625       +1     

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