Follow-up from "Add database major version upgrade warning to our Geo docs"

The following discussion from !132115 (merged) should be addressed:

• @alvin started a discussion: (+2 comments)

  @axil I think that my MR is also missing an important bit: I have linked to the Omnibus database docs warning but would this same warning apply to other architectures? Would it apply to packaged databases as well as external ones?

  @sranasinghe Would you know the answer to this?

  As an iterative step, should we merge this and then create another docs MR to address the other architectures and deployment types?

  OR, if the same warning applies to all of the above, could we modify the warning section in the Omnibus docs to explicitly state this?