Standardize how to add encounters to a project in bulk imports

[goddesswarship]

Expected behavior
When adding encounters to a bulk import, users enter "ProjectName-" into theEncounter.project0.projectIdPrefix field

Current behavior
Bulk import looks for the subsequent # symbols from the project ID and rejects importing the encounter to the project if those aren't included (such as "ProjectName-####")

QA Notes
This was reported and observed in Flukebook, but testing in QA environment worked with the "ProjectName-" method.

Community link
https://community.wildme.org/t/how-i-assign-results-of-a-bulk-import-to-an-existing-project/4439/11