Restrict project archive to admins or owners

To help teams better organize their projects, maintain parent/child structure, and stay consistent, we've restricted project deletion and archiving to admins or project owners only.

When a non-admin or owner tries to archive a project, they will see the message that "Only workspace admins or the project owner can archive."

Thank you to Bri at Elevate and Ryan at Scrum50 for voting on this feature.