feat: Add multiple collaborators to a ticket

[Akashsah2003]

Description

Please include a short description of the suggested change and the reasoning behind the approach you have chosen.
This PR aims to add a new feature which is adding multiple collaborators to a ticket.

• Now we can add multiple collaborators in a ticket.
• These collaborators can track these tickets through their dashboard, calendar and project page.

Link to ticket

Please add a link to the GitHub issue being addressed by this change.
Closes #1099

Type

• Fix
• Feature
• Cleanup

Screenshot of the result

If your change affects the user interface, you should include a screenshot of the result with the pull request.

[CLAassistant]

All committers have signed the CLA.

[adepreville-mkg]

any news ? This will be great !

[marcelfolaron]

Thank you! This is great!

[marcelfolaron]

Can you take a look at the acceptance tests and make sure they pass? On your local machine you can run

make run acceptance-test

[Akashsah2003]

Can you take a look at the acceptance tests and make sure they pass? On your local machine you can run

make run acceptance-test

I have corrected the error. The issue was I corrected column name to entityA which was enitityA before in zp_entity_relationship but this change was not being correctly applied in fresh install. Now the acceptance tests are passing.