Make 16.11/7.11 minimum required version to upgrade to 17.0/8.0

Summary

As 16.11 is a confirmed scheduled upgrade stop, marking it as a stop before upgrading any further.

Acceptance criteria

• Attempt to upgrade from any version prior to 16.11/7.11 -> 17.0/8.0 will be prevented and output a suggestion to upgrade to 16.11/8.0 first

Last time we did this: !3559 (merged)