PR Summary

This PR adds a check to avoid adding the same module names again and again if multiple modules with the same name is found (multiple versions or multiple install locations) similar to this previous PR for command names:#21113

PR Context

FixesPowerShell/vscode-powershell#5184

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Make sure all.h,.cpp,.cs,.ps1 and.psm1 files have the correct copyright header
• This PR is ready to merge. If this PR is a work in progress, please open this as aDraft Pull Request and mark it as Ready to Review when it is ready to merge.
• Breaking changes
  • None
  • OR
  • Experimental feature(s) needed
    • Experimental feature name(s):
• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed
    • Issue filed:
• Testing - New and feature
  • N/A or can only be tested interactively
  • OR
  • Make sure you've added a new test if existing tests do not effectively test the code changed