fix: remove avp prefix from aws env vars

[werne2j]

Description

For AWS secrets manager, we have to use the aws defined env vars without the AVP prefix.

Fixes: #133 #131

Checklist

Please make sure that your PR fulfills the following requirements:

• Reviewed the guidelines for contributing to this repository
• The commit message follows the Conventional Commits Guidelines.
• Tests for the changes have been updated
• Docs have been added / updated

Type of Change

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• New tests
• Build/CI related changes
• Documentation content changes
• Other (please describe)

Other information

Also added k8s as a valid auth type to the supported parameters table

[codecov]

Codecov Report

Merging #134 (568d67b) into main (60292a8) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #134   +/-   ##
=======================================
  Coverage   57.88%   57.88%           
=======================================
  Files          16       16           
  Lines         539      539           
=======================================
  Hits          312      312           
  Misses        187      187           
  Partials       40       40           

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