feat(API): Support read only replica configuration for Postgres via environment variables

[vicferpoy]

Description

Please include a summary of the change and which issue is fixed. List any dependencies that are required for this change.

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.
• Review if is needed to change the Readme.md

API

• Verify if API specs need to be regenerated.
• Check if version updates are required (e.g., specs, Poetry, etc.).
• Ensure new entries are added to CHANGELOG.md, if applicable.

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 88.88889% with 2 lines in your changes missing coverage. Please review.

Project coverage is 92.27%. Comparing base (fed2046) to head (f6780ab).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7210      +/-   ##
==========================================
- Coverage   92.28%   92.27%   -0.01%     
==========================================
  Files          81       81              
  Lines        7333     7338       +5     
==========================================
+ Hits         6767     6771       +4     
- Misses        566      567       +1     

Flag	Coverage Δ
api	92.27% <88.88%> (-0.01%)	⬇️

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

Components	Coverage Δ
prowler	∅ <ø> (∅)
api	92.27% <88.88%> (-0.01%)	⬇️

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