refactor(run_check): Simplify and add tests

[jfagoagas]

Description

• Simplify and add tests for the run_check function.
• Remove a sys.exit() while getting the check's compliance dict and return {} if some exception is raised.

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 50.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 86.67%. Comparing base (8d4abd7) to head (9389f99).
Report is 1 commits behind head on master.

Files	Patch %	Lines
prowler/lib/check/check.py	60.00%	2 Missing ⚠️
prowler/lib/outputs/compliance/compliance.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4183      +/-   ##
==========================================
+ Coverage   86.62%   86.67%   +0.04%     
==========================================
  Files         817      817              
  Lines       25578    25579       +1     
==========================================
+ Hits        22157    22170      +13     
+ Misses       3421     3409      -12     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[sergargar]

LGTM