Most of the shared context are located under
spec/support/shared_contexts, we only have one file under
spec/support/shared_context, this MR moves it to
spec/support/shared_contexts instead

Extract acme double to helper

Create ACME challanges for pages domains

* Create order & challange through API
* save them to database
* request challenge validation

We're saving order and challenge as one entity,
that wouldn't be correct if we would order certificates for
several domains simultaneously, but we always order certificate
per domain

Add controller for processing acme challenges redirected from pages

Don't save acme challenge url - we don't use it

Validate acme challenge attributes

Encrypt private_key in acme orders

This backports to ce a refactor of the shared example 'a controller that
can serve LFS files'.

The ee MR that contains the original refactor is
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/13389

The reason for the refactor was mostly the removal of the outer context
as it didn't need to be there, and prevented let(:lfs_oid) from being
overwritten.

The shared example was also renamed to be more descriptive.

Default masked to false for new variables

Closes gitlab-ee#11204

See merge request gitlab-org/gitlab-ce!28186

Set the default value to false
Adjust tests to expect false as the default
Update documentation to make new default clear

Resolve "Use GitLab serverless with existing Knative installation"

Closes #58941

See merge request gitlab-org/gitlab-ce!27173

- Renames attributes from stat to project_statistiscs_name and attribute
to statistic_attribute
- Reordes methods on UpdateProjectStatistics concern
- Removes unused module from Ci::Build

Upgrade Gitaly to v1.43.0

See merge request gitlab-org/gitlab-ce!28867