Add groups.group_add_subscriber

[LucasG0]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
infrahub_sdk/groups.py	0.00%	7 Missing ⚠️

@@             Coverage Diff             @@
##           develop     #125      +/-   ##
===========================================
+ Coverage    64.34%   65.33%   +0.99%     
===========================================
  Files           75       76       +1     
  Lines         6893     6903      +10     
  Branches      1365     1367       +2     
===========================================
+ Hits          4435     4510      +75     
+ Misses        2103     2027      -76     
- Partials       355      366      +11     

Flag	Coverage Δ
python-3.10	44.37% <0.00%> (+1.02%)	⬆️
python-3.11	44.37% <0.00%> (+1.02%)	⬆️
python-3.12	44.37% <0.00%> (+1.02%)	⬆️
python-3.9	43.66% <0.00%> (+0.37%)	⬆️
python-filler-3.12	23.81% <0.00%> (-0.04%)	⬇️

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Files with missing lines	Coverage Δ
infrahub_sdk/groups.py	0.00% <0.00%> (ø)

... and 8 files with indirect coverage changes