Figure out how to block adding extra view to bundled ddocs

[dianabarsan]

Is your feature request related to a problem? Please describe.
Adding views to bundled ddocs is potentially destructive, because adding or editing a view requires the reindexing of the whole ddoc, which will potentially cause some sort of downtime (depending on which ddoc, downtime can be total or partial - with only some services not working) and will require all the extra disk space that is required for the ddoc reindex.

Describe the solution you'd like
Figure out a way to stop editing these ddocs. This way should still allow upgrades that would potentially add new views.

Describe alternatives you've considered
Limit to documentation.

Additional context
In a large production instance, a new workflow required adding a new view. The managing team added the view to an existent ddoc, and the instance ran out of disk space while indexing.