refactor(execute_check): refactor execute method

[pedrooot]

Description

Refactor execute method to make the minimum logic inside this method.

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 37.03704% with 34 lines in your changes missing coverage. Please review.

Project coverage is 89.07%. Comparing base (0e5f929) to head (3a8aa27).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
prowler/lib/check/check.py	31.11%	31 Missing ⚠️
prowler/lib/scan/scan.py	66.66%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4975      +/-   ##
==========================================
+ Coverage   89.04%   89.07%   +0.03%     
==========================================
  Files         982      982              
  Lines       30106    30126      +20     
==========================================
+ Hits        26809    26836      +27     
+ Misses       3297     3290       -7     

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