Add all existing finding notes to the JIRA when created

[coheigea]

Tested locally correctly.

Fixes: https://github.com/DefectDojo/django-DefectDojo/issues/6434

[coheigea]

@Maffooch It looks like modifying test_import_with_push_to_jira_add_comment in that file to set push_to_jira=false on the initial import, then add the comment and push to JIRA, should work. However, I don't think I can add a test without:

"# if you need some credentials for the Defect Dojo JIRA Cloud instance, contact one of the moderators"

[coheigea]

@Maffooch @damiencarol How can we move forward with getting this merged?

[Maffooch]

@coheigea This totally slipped through the cracks. Sorry about that! I will add a test for this today.