fix(cloudsql): add trusted client certificates case for cloudsql_instance_ssl_connections

[puchy22]

Context

Check cloudsql_instance_ssl_connections was not supporting for trusted clients certificates that is a way of SSL connection.

Fix #6668

Description

• Change check logic to only FAIL with unencrypted connections
• Cover the case with tests.

Checklist

• Are there new checks included in this PR? No
  • If so, do we need to update permissions for the provider? No.
• 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.
• Review if is needed to change the Readme.md

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

All modified and coverable lines are covered by tests ✅

Project coverage is 89.36%. Comparing base (86950c3) to head (524fa75).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6682      +/-   ##
==========================================
- Coverage   89.38%   89.36%   -0.02%     
==========================================
  Files        1182     1182              
  Lines       33816    33816              
==========================================
- Hits        30226    30221       -5     
- Misses       3590     3595       +5     

Flag	Coverage Δ
prowler	89.36% <100.00%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
prowler	89.36% <100.00%> (-0.02%)	⬇️
api	∅ <ø> (∅)

[ejohn20]

@puchy22 Looks great! This PR gives me a good idea of what the corresponding test case would need to look like. Thank you for adjusting that.

[MrCloudSec]

Good catch!! 👏🏼👏🏼👏🏼👏🏼

[prowler-bot]

💚 All backports created successfully

Status	Branch	Result
✅	v3
✅	v4.6
✅	v5.0
✅	v5.1
✅	v5.2

Questions ?

Please refer to the Backport tool documentation and see the Github Action logs for details