Create test and enable registry BBM on (no-id-column) blobs table

The following discussion from !1614 (merged) should be addressed:

From discussion: (+14 comments):

The current process for BBM does not reliably support BBMs on the registry's blobs tables. Theres are a few ideas in the thread above that talk about ways we can build on the existing approach introduced in #221 (closed) to support blobs BBMs. Evaluate the suggested approach and come up with a approach that works well for blobs