Remove btn-link class on Edit, Destroy and Revoke buttons

What does this MR do?

Removes the btn-link class on Edit, Destroy and Revoke buttons in Applications Settings, this make the elements not having an underline style when hovered.

Are there points in the code the reviewer needs to double check?

That the buttons still work properly.

Why was this MR needed?

Because hovering the buttons make their text hovered and that is not the behaviour of other buttons in the platform.

What are the relevant issue numbers?

#18932 (closed)

Screenshots (if relevant)

After:

Before:

Does this MR meet the acceptance criteria?

• [ ] CHANGELOG entry added
• [ ] Documentation created/updated
• [ ] API support added
• Tests
  • [ ] Added for this feature/bug
  • All builds are passing
• Conform by the style guides
• Branch has no merge conflicts with master (if you do - rebase it please)
• Squashed related commits together

cc: @jschatz1