CE-1786: Separate Git info from IOC instances to a new endpoint

Fetching Git information (Git project name and Git project url) has been moved to a separated endpoint from IOC Instance list.

The new endpoint is: [GET] /api/v1/git_helper/{project_id}/info

And it response schema is:

{
  "project_id": 1,
  "project_url": "project url",
  "project_name": "project name"
}