Install PyYAML package using system apt or dnf

[chmouel]

or fallback to pip --break-system-packages
and reformat files

Fixes #1772

Changes

Submitter Checklist

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[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 65.16%. Comparing base (9e71fa3) to head (d836da9).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/provider/github/app/token.go	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1773      +/-   ##
==========================================
- Coverage   65.16%   65.16%   -0.01%     
==========================================
  Files         174      174              
  Lines       13246    13250       +4     
==========================================
+ Hits         8632     8634       +2     
- Misses       4041     4043       +2     
  Partials      573      573              

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