Create Support for gitlab integration

[adnanhashmi09]

Why do we need this ?

Currently we only have github support. We need to support gitlab integration as well. It has also been requested in #358. This issue will track all the subtask necessary for completely integrating gitlab.

This effort will be considered complete when all the subtasks are completed.

Subtask

Backend Efforts

• Add gitlab ExAPI service to fetch gitlab data using user's PAT #456
• Create Gitlab sync ETL Handler to sync repos, incidents and prs data #465
• Create revert pr sync for gitlab to map incidents #460
• Implement and APIs which will be called by the frontend #467
• Make API for getting all the opensource projects accessible through the PAT

Frontend Efforts

• Add integration card, checks and validations for Gitlab integration
• Remove hardcoded values of Integrations.GITHUB across the code-base
• Create APIs for searching projects across Gitlab
• Handle URL based searching in-case of repos/projects not found

[e-for-eshaan]

@adnanhashmi09 is this complete?

[adnanhashmi09]

@adnanhashmi09 is this complete?

Nope, this issue will also include the frontend tasks. This issue shall be closed after the entire feature is completed. Backend + Frontend

[jayantbh]

Note: Gitlab integration is parked temporarily.

[e-for-eshaan]

Gitlab integration is complete, woohoo 🎉