[publication] Fix collaborator behaviour

[skarya22]

Brief summary of changes

• Publication collaborator behaviour was a bit confusing and not future proof. Issues such as:
  • Two publications could not have a collaborator with the same name and different emails
  • Same issue with Lead Investigator and a collaborator in another publication
• Resolved by separating the publication_collaborator table to have one entry per collaborator per publication. There is no reason for two publications to point to the same collaborator since they are editable in each publication.

Testing instructions (if applicable)

1. Create a publication with lead investigator x, and collaborator y
2. Create another publication with lead investigator y and collaborator x
3. Create another publication with lead investigator x but a different email
4. create another publication with collaborator y but with a different email
5. create another publication with some other name, but collaborator y's email

Link(s) to related issue(s)

• Resolves [publication] Can not enter email for collaborator #9590

This is an Override from CCNA

[skarya22]

@kongtiaowang could you take a look at this? I can't figure out why the test is failing