fix(publications): fix import missing information

Description

fix(publications): fix import missing information

• importing publications from external sources would result in missing info (e.g. externalId, publicationsSystemId etc.)
• edited table columns to make more sense and match old GUI

How to test

Manually import any publications. See perun!4291 (merged) for more info

Author's checklist

• I have followed the contribution guidelines
• This MR has been tested or does not change functionality
• I have added relevant merge request dependencies (if this MR has any)
• I have added the correct labels
• I have assigned reviewers (if any are relevant)
• I have edited the documentation (if the changes require it) or I have noted the need for the change if I do not have access to the documentation
• I have marked all introduced BREAKING CHANGES or necessary DEPLOYMENT NOTES in the commit message(s)

Reviewer's checklist

• This MR has been tested or does not change functionality
• This MR has correct commit message format

Other information

I have not yet tested this, local testing of the publications application might require the HTTPS setup, I will need to play around with it a bit more Tested locally and works

Related issues

re STR-1185