fix(aws): support for version stage

[werne2j]

Description

Add support for AWSCURRENT and AWSPREVIOUS

Fixes: #453

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
• Are you adding dependencies? If so, please run go mod tidy -compat=1.17 to ensure only the minimum is pulled in.
• Docs have been added / updated
• Optional. My organization is added to USERS.md.

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)

[codecov-commenter]

Codecov Report

Merging #486 (663040e) into main (98e3987) will decrease coverage by 0.15%.
The diff coverage is 40.00%.

@@            Coverage Diff             @@
##             main     #486      +/-   ##
==========================================
- Coverage   77.70%   77.55%   -0.15%     
==========================================
  Files          24       24              
  Lines        1610     1613       +3     
==========================================
  Hits         1251     1251              
- Misses        268      269       +1     
- Partials       91       93       +2     

Impacted Files	Coverage Δ
pkg/backends/awssecretsmanager.go	65.85% <40.00%> (-5.20%)	⬇️

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