Remove Beta tags from Product & Docs

[Kira-Pilot]

We should remove the beta label from Coder and from our docs.

[Anandesh-Sharma]

Good work!

[Kira-Pilot]

Beta tags should be removed before the March release (Docs tags just before the release).

[EdwardAngert]

• for me: stage docs PR that removes beta tags and hold for release
  • docs: remove beta and closed issues from orgs doc coder#16361