Refactor 'Install-WinCNIPlugin' to use 'Install-RequiredFeature'

[TinaMor]

PR description

Refactor 'Install-WinCNIPlugin' to use 'Install-RequiredFeature to make it easier to maintain.

Checklist

As part of our commitment to engineering excellence, before submitting this PR, please make sure:

• You've tested this code in both Desktop & Server environments and AMD & ARM64 enviroments (functional testing).
• You've reviewed the PR/code best practices defined in the CONTRIBUTING.md.
• You've added unit tests for new code.
• You've added/updated documentation in the cmdlet docs, command-reference.md and the modules help files.

In addition, after this PR has been reviewed, please agree to:

• Validate your changes have not introduced any regressions.
• If changes have been made to your PR in the process of addressing comments, please make sure to test again the final version in both AMD and ARM64 environments.