[skip-changelog] Replace some function under algorithms pkg with go.bug.st/f

[alessio-perugini]

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• Tests for the changes have been added (for bug fixes / features)
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What kind of change does this PR introduce?

We promoted algorithms pkg to a dedicated pkg under go.bug.st/f

What is the current behavior?

What is the new behavior?

Does this PR introduce a breaking change, and is titled accordingly?

Other information

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.65%. Comparing base (24799f3) to head (f4cbfed).
Report is 5 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2812      +/-   ##
==========================================
+ Coverage   67.63%   67.65%   +0.02%     
==========================================
  Files         238      238              
  Lines       22392    22372      -20     
==========================================
- Hits        15144    15135       -9     
+ Misses       6060     6043      -17     
- Partials     1188     1194       +6     

Flag	Coverage Δ
unit	67.65% <ø> (+0.02%)	⬆️

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