Geo: Provide more information when the verification status is N/A

Problems to solve

Coming from the design discussion - #329851 (comment 567082777)

We need to specify why users are seeing N/A and better link them to our documentation - which datatype we supported for the verification.

Documentation link - https://docs.gitlab.com/ee/administration/geo/replication/datatypes.html#data-types

Design

• Figma spec 🔗
• Copy: N/A: Geo does not verify this component yet. See the data types we plan to support.