feat: Modifies the AWS vault implementation to update existing secrets

[zub4t]

What this PR changes/adds

This PR updates the AWS Vault implementation to match the behavior of HashiCorp Vault. Previously, the store method in the AWS Vault implementation only created new secrets. With this update, the method now supports both creating and updating secrets, aligning it with the behavior of HashiCorp Vault.

Why it does that

This update is required because the recent addition of the Secrets Manager API introduces the capability to update secrets. As a result, the AWS Vault implementation must be updated to handle secret updates in addition to secret creation.

Linked Issue(s)

Closes #373

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Codecov Report

Attention: Patch coverage is 72.72727% with 3 lines in your changes missing coverage. Please review.

Project coverage is 65.47%. Comparing base (d177a98) to head (ee5e740).
Report is 54 commits behind head on main.

Files	Patch %	Lines
.../eclipse/edc/vault/aws/AwsSecretsManagerVault.java	72.72%	3 Missing ⚠️

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Additional details and impacted files

@@             Coverage Diff              @@
##               main     #379      +/-   ##
============================================
+ Coverage     63.82%   65.47%   +1.65%     
- Complexity        0      113     +113     
============================================
  Files            26       28       +2     
  Lines           633      672      +39     
  Branches         30       32       +2     
============================================
+ Hits            404      440      +36     
+ Misses          222      218       -4     
- Partials          7       14       +7     

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[ndr-brt]

please fix the failing check and I will merge this