Fix migrate! method (Minimal fix with ExclusiveLock to prevent race conditions)

Closes #4928 and #4980

See merge request gitlab-org/gitlab-ee!4624

Fix migrate! method (Minimal fix with ExclusiveLock to prevent race conditions)

Closes #4928 and #4980

See merge request gitlab-org/gitlab-ee!4624

This reverts commit 54a575f1, reversing
changes made to c63af942.

Move uploads to object storage

Closes #4163

See merge request gitlab-org/gitlab-ee!3867

Transfer job archives after creation

See merge request gitlab-org/gitlab-ee!3646

Can migrate LFS objects to S3 style object storage

Closes #2841

See merge request !2760

[10.3] Migrate `can_push` column from `keys` to `deploy_keys_project`

See merge request gitlab/gitlabhq!2276

(cherry picked from commit f6ca52d31bac350a23938e0aebf717c767b4710c)

1f2bd3c0 Backport to 10.3

The helper creates a fork of a project with all provided attributes,
but skipping the creation of the repository on disk.

In GitLab EE, a GitLab instance can be read-only (e.g. when it's a Geo
secondary node). But in GitLab CE it also might be useful to have the
"read-only" idea around. So port it back to GitLab CE.

Also having the principle of read-only in GitLab CE would hopefully
lead to less errors introduced, doing write operations when there
aren't allowed for read-only calls.

Closes gitlab-org/gitlab-ce#37534.

Changes to `GitHttpClientController`’s authentication logic caused this behavior change.

The old 401 Unauthorized statuses didn’t cause any harm, but they weren’t quite as accurate as the new behavior.

Use the EnforcedStyleForMultiline: no_comma option.

Signed-off-by: Rémy Coutable <remy@rymai.me>

LFS has the `authenticated` field in the response for downloads of
objects to indicate that the object does not need authentication to
access it.

Spec: https://github.com/git-lfs/git-lfs/blob/master/docs/api/batch.md#successful-responses

Fixes #23360.

Due to different way of handling owners of a project, they were not allowed to fetch CI sources for project.

Reset expiry time of token, if token is retrieved again before it expires.

Do not regenerate the `lfs_token` every time `git-lfs-authenticate` is called, instead return the saved token if one is present.

Revert "Revert all changes introduced by https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6043"

This reverts commit 6d43c95b.

Use special characters for `lfs+deploy-key` to prevent a someone from creating a user with this username, and method name refactoring.

Refactored LFS auth logic when using SSH to use its own API endpoint `/lfs_authenticate` and added tests.

- Required on the GitLab Rails side is mostly authentication and API related.