Fix final choices saving in optimizers

[MorrisNein]

The change uses cycle break instead of early return in optimizer.

This allows to close the progress bar and to save the final choices to history.

[codecov-commenter]

Codecov Report

Merging #227 (8ba2a8a) into main (fcc23ec) will increase coverage by 0.01%. The diff coverage is 50.00%.

@@            Coverage Diff             @@
##             main     #227      +/-   ##
==========================================
+ Coverage   73.75%   73.76%   +0.01%     
==========================================
  Files         131      131              
  Lines        7834     7834              
==========================================
+ Hits         5778     5779       +1     
+ Misses       2056     2055       -1     

Files	Coverage Δ
golem/core/optimisers/populational_optimizer.py	95.69% <100.00%> (ø)
golem/core/optimisers/meta/surrogate_optimizer.py	0.00% <0.00%> (ø)

... and 1 file with indirect coverage changes