feat: is_core_service BackendType static method

[b-matteo]

Description

Implement the 3 new backend types: Discovery Headless, CoreService on Linux and CoreService on Windows
Implement a method to determine whether the backend if of CoreService Kind
Rename skip_if_linux method skip_if_core_service
adapt comments

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate unit tests.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have added the minimum version decorator to any new backend method implemented.
• I have made sure that the title of my PR follows Conventional commits style (e.g. feat: extrude circle to cylinder)

[RobPasMue]

Just one small comment - otherwise LGTM!

[codecov]

Codecov Report

Attention: Patch coverage is 46.66667% with 8 lines in your changes missing coverage. Please review.

Project coverage is 91.37%. Comparing base (082ea4d) to head (bfc340f).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/ansys/geometry/core/connection/client.py	0.00%	6 Missing ⚠️
...ansys/geometry/core/connection/product_instance.py	0.00%	1 Missing ⚠️
src/ansys/geometry/core/modeler.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1692      +/-   ##
==========================================
- Coverage   91.44%   91.37%   -0.07%     
==========================================
  Files          87       87              
  Lines        7131     7143      +12     
==========================================
+ Hits         6521     6527       +6     
- Misses        610      616       +6     

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