Use Go’s Native “errors” Package

Description

This PR modifies the code and replaced third-party error-handling libraries with the native “error” package.

We mainly replace errors.Wrap() with its equivalent errors.Join().

This change reduces dependencies, probably improves performance, and also makes the codebase more secure.

Test Policy Compliance

[x] I have added or updated unit tests for my changes.
[x] I have included integration tests where applicable.
[x] All new and existing tests pass successfully.

Code Quality

[x] I have followed the coding standards for this project.
[x] I have performed a self-review of my code.
[x] My code is well-commented, particularly in areas that may be difficult to understand.

Documentation

[x] I have made corresponding changes to the documentation (if applicable).
[x] I have updated any relevant READMEs or wiki pages.

Additional Comments

Include any additional comments or context about the PR here.

Checklist

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[x] You have read the contributing guidelines and especially the test policy.
[x] You have thoroughly tested your changes.
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[x] You understand and agree that your contributions will be publicly available under the project's license.

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vmware-tanzu / secrets-manager