[Fix] GR1 V6 and GR7 V3 Added appropriate messaging for uploaded file with incorrect extension and a few misc. update

[dutt0]

Overview/Summary

This pull request determines if its a file extension error and provide the appropriate message for clients to consider the file type may be causing the error rather than the filename or not being uploaded

This PR fixes/adds/changes/removes

This Pull Request

• adds a new message for GR1V6 and GR7V3 when file is uploaded with appropriate file name but with wrong extension.
• updates the bug report and enhancement template (includes version tag etc.)
• uses list variable for the role names which can be customized in one go (Reference context SCRv2.1.2 number 8, December2024)
• removes debug code ((Reference context SCRv2.1.2 number 4, December2024)

Breaking Changes

n/a

Testing Evidence

As part of this Pull Request I have

• Checked for duplicate Pull Requests
• Associated it with relevant GitHub Issues
• Ensured my code/branch is up-to-date with the latest changes in the main branch
• Performed testing and provided evidence.
• Updated relevant and associated documentation.
• Ensure PowerShell module versions have been updated (manually or with the ./tools/Update-ModuleVersions.ps1 script)