Only let Datahub Support remove workspace leads from workspaces

[gcnabeel]

Pull Request

Description

In the workspace user management screen, only datahub support should be allowed to remove workspace leads,

Related Issues

9660 - Only let Datahub Support remove workspace leads

Changes

added a method to determine access level in the users table

Checklist

• [✔️ ] Code follows dotnet coding standards
• Tests added/updated to cover changes

[gcnabeel]

This PR only addresses the functionality behind who can and cannot remove workspace leads. A couple of things to consider, based on the bug report:

1. When a user has lost the workspace lead privilege, it should be taken into effect right away -> this needs to be tested (probably in another task/PR)
2. Can a Datahub Support remove all workspace leads? Currently, yes. In the bug report, it stated that the page crashed when all workspace leads were removed, but I was not able to reproduce that