Now that we have the UploadLinkFilter, the RepositoryLinkFilter should
be a no-op (in particular, making no Gitaly calls) when it doesn't have
anything to do. To ensure that happens:

1. Remove upload handling from RepositoryLinkFilter.
2. Add a spec to ensure that this case generates no Gitaly calls.
3. Move common code to a mixin.

This takes upload link processing away from RepositoryLinkFilter,
allowing the latter to perform Gitaly optimisations without worrying
about whether or not they make sense for upload links.

This filter also makes RepositoryLinkFilter a no-op if the only relative
links in a document are to uploads.

The end goal of this change is to split the RelativeLinkFilter into two
filters:

1. UploadLinkFilter (must run first)
2. RepositoryLinkFilter

This means that each filter will be easier to understand, and we'll also
be able to apply Gitaly-specific optimisations to the
RepositoryLinkFilter without having to worry about upload links. By
putting the UploadLinkFilter first, we'll also effectively short-circuit
any Gitaly calls when a document's only relative links are upload links.

This is a standalone commit because it's a rename and those can be hard
to follow when mixed with other changes.

This hasn't been used since ace833b3.

Fix typo in vault.md docs

See merge request gitlab-org/gitlab!22162

Simplify test code

See merge request gitlab-org/gitlab!22805

Update docs to be based on kubectl logs:

See merge request gitlab-org/gitlab!22812

Replace set to let_it_be in ee/spec/controllers

See merge request gitlab-org/gitlab!22775

docs: Extend the MVC product limits page with two more examples

See merge request gitlab-org/gitlab!22888

MWPS merges immediately if the pipeline succeeded

Closes #121620

See merge request gitlab-org/gitlab!22777

When passing MWPS to the merge API, we should merge the MR immediately
when the pipeline already succeeded.

On the other hand, we should not merge the MR when passing MWPS and
the pipeline failed, even if the project allows merging with a failing
pipeline.

Add missing docs instruction for bg migrations

See merge request gitlab-org/gitlab!22818

Missed a line linking to the added heading, in the upgrade docs.

Add dynamic deadlines to gitaly

See merge request gitlab-org/gitlab!21492

Accept Envelope-To header

Closes #37359

See merge request gitlab-org/gitlab!22354

This makes sure that the deadline we set on a gitaly call never
exceeds the request deadline.

We also raise an exception if the request deadline has already been
exceeded by the time we're trying to make a Gitaly call.

These deadlines don't apply when calling gitaly from Sidekiq.

We do this by storing the start time of the request in the request
store on the thread (using the RequestStore).

The maximum request duration defaults to 55 seconds, as the default
worker timeout is 60 seconds. But can be configured through
gitlab.yml.

API to delete self-monitoring project and monitor status

See merge request gitlab-org/gitlab!21431

Fix typo "available"

See merge request gitlab-org/gitlab!22763

FE for share groups with groups

See merge request gitlab-org/gitlab!17139

Implement frontend support for sharing groups with groups
Unify templates for sharing projects and groups with groups

Add omnibus migrate legacy uploads out of deprecated paths command, cleanup wording

See merge request gitlab-org/gitlab!16893

Connect options helper in container expiration settings

See merge request gitlab-org/gitlab!22112

- getters file
- index changes

Use GraphQL mutation to toggle Epic subscription

Closes #34132

See merge request gitlab-org/gitlab!22872

GKE network and subnetwork dropdowns

This MR implements two dropdown fields used by the GKE cluster configuration form: network and subnetwork. This MR only contains the dropdown component implementations but it does not integrate the dropdowns in the form. The purpose is to keep the size of the MR manageable. 

To test the dropdowns, please use the following integration MR https://gitlab.com/gitlab-org/gitlab/merge_requests/22344

### Screenshots

![Screen_Shot_2020-01-09_at_2.55.28_PM](/uploads/a823f1675816d929c8bfacdc1cd5afb6/Screen_Shot_2020-01-09_at_2.55.28_PM.png)

See merge request gitlab-org/gitlab!22717

Implement dropdowns to select network and subnetworks
for a GKE cluster

Group Security Dashboard `summary` endpoint is timing out

Closes #13707

See merge request gitlab-org/gitlab!21373

Customizable commit messages for applied suggested changes

Closes #13086

See merge request gitlab-org/gitlab!21411

Replace set to let_it_be in ee/spec/features

See merge request gitlab-org/gitlab!22782

Frontend - Resolve "Display in MR if security report is outdated"

See merge request gitlab-org/gitlab!20954

When the last pipeline for the target branch hadn't detected some
security issues, maybe due to jobs failed or artifacts expired, the
MR security report should be considered outdated and the pipeline needs
to be re-run. It also handles the edge case when target branch has
received more commits and the current branch needs to be updated.

Add RECaptcha to new sign up flow

See merge request gitlab-org/gitlab!22779

Fix typo in Remove Node Modal

See merge request gitlab-org/gitlab!22494

- Add shared examples
- Add credit to community contributor

Create downstream pipeline in same project (2nd attempt)

See merge request gitlab-org/gitlab!22663

Contributes to https://gitlab.com/gitlab-org/gitlab/issues/27922

Force 2FA code input to show only numeric keyboard on touch devices

See merge request gitlab-org/gitlab!22868