Career marketplace groups and levels

[AdiMakkar]

closes gctools-outilsgc/gcconnex#2570

[azure-pipelines[bot]]

Test instance up at: https://gccollab-dev-pr-2614.azurewebsites.net/

[Phanoix]

work left:

• [ ] added input needs to be updated to be group + level input
• [ ] display the multiple groups+level pairs when viewing the opportunity
• [ ] edit form
• [ ] save action needs to handle saving for multiple groups+level pairs

[AdiMakkar]

PR closed since the scope has changed and this task has been removed from the low hanging UX Career Improvements task.