refactor(azure): get locations with self session

[pedrooot]

Description

This pull request includes changes to the azure_provider.py file within the prowler/providers/azure directory. The main focus of these changes is to simplify the get_locations method by removing the need to pass credentials as an argument and instead using the session directly.

Key changes include:

• Simplification of the __init__ method by removing the credentials argument from the get_locations method call.
• Modification of the get_locations method to no longer require credentials as an argument and directly use the session for authentication.

Checklist

• Are there new checks included in this PR? Yes / No
  • If so, do we need to update permissions for the provider? Please review this carefully.
• Review if the code is being covered by tests.
• Review if code is being documented following this specification https://github.com/google/styleguide/blob/gh-pages/pyguide.md#38-comments-and-docstrings
• Review if backport is needed.

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Attention: Patch coverage is 30.00000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 89.91%. Comparing base (5641160) to head (bfe4d6d).
Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
prowler/providers/azure/azure_provider.py	22.22%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5751      +/-   ##
==========================================
+ Coverage   89.83%   89.91%   +0.07%     
==========================================
  Files        1128     1128              
  Lines       35154    35152       -2     
==========================================
+ Hits        31582    31606      +24     
+ Misses       3572     3546      -26     

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