Refactor git functionality into OpenQA::Git

[r-richardson]

Refactor git related functions from OpenQA::Task::Git::Clone into the OpenQA::Git module for easier re-usability.
Related Ticket: 164886

• Turn git functions into git module methods
• Avoid array recreation with _run_cmd helper method and optional use_ssh and use_path parameters
• Improve and adjust and test cases
• Fix merge conflicts after rebase to master branch

[perlpunk]

Regarding the method names:
In non object oriented code, it can be good to have functions with a common prefix, so it made sense to have git prepended in the current version.
Now for a module that is called OpenQA::Git and the object is called $git, I think we can remove those prefixes.
e.g.

- my $origin_url = $git->git_get_origin_url;
+ my $origin_url = $git->get_origin_url;

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.72%. Comparing base (dc7960b) to head (c2f1864).
Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5900   +/-   ##
=======================================
  Coverage   98.71%   98.72%           
=======================================
  Files         394      394           
  Lines       38657    38672   +15     
=======================================
+ Hits        38162    38180   +18     
+ Misses        495      492    -3     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[perlpunk]

Approving anyway to get things forward