Add add_group_into_project_role to jira_server.py

[neyrat-salvator]

Method add_project_actor_in_role have an condition for group instead of user but there was not a method for this. I added that

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 60.56%. Comparing base (7e41dea) to head (dcbcadf).

Files with missing lines	Patch %	Lines
atlassian/jira/jira_server.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1671      +/-   ##
==========================================
- Coverage   60.56%   60.56%   -0.01%     
==========================================
  Files         106      106              
  Lines       18084    18086       +2     
  Branches     1851     1851              
==========================================
+ Hits        10952    10953       +1     
- Misses       6667     6668       +1     
  Partials      465      465              

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