[publication] Fix edit PI issue

[victori444]

Brief summary of changes

In the Publication module, when editing a PI for a project (name/email), all other projects with the same PI would be modified. This PR takes the PI's email as the PI's identifier and

• if the email is updated to an existing email in the db, updates the name associated to the email and the project's LeadInvestigatorID
• if the email is updated to a new email, creates a new collaborator with a new ID
• if the email is not updated and the name is updated, updates the name associated to the email

Testing instructions (if applicable)

1. Create new projects with different PIs
2. Edit the PI information (name & email) in various ways and check that the projects are updated accordingly
3. Verify in the publication_collaborator table that when an email is updated to a new email that does not exist, a new collaborator is created, and the original collaborator is not replaced in the database

CCNA Override