Since console is aiming for adopting PF6 in 4.18, we need to start the deprecation process in 4.16, due to the N+1 deprecation policy.

This will give us time in 4.17 to prepare console for adopting the PF6.

This will give plugins time to move to PF5.

AC:

• Deprecate PF4 in plugin docs in console repo
• Address the deprecation in release notes
• Make announcement to #forum-ui-extensibility and on xyz mailing list