Enforce application wide terms

Closes #44798

See merge request gitlab-org/gitlab-ce!18570

AutoDevOps Docs fix invalid external link

Closes #46056

See merge request gitlab-org/gitlab-ce!18748

Ignore knapsack and rspec_flaky

See merge request gitlab-org/gitlab-ce!18747

Backport IdentityLinker#failed? from GroupSaml callback flow

See merge request gitlab-org/gitlab-ce!18749

Ensure when accessing Rails, we really get ::Rails (and not Sidekiq::Rails)

See merge request gitlab-org/gitlab-ce!18730

Replace commits spinach tests with RSpec analog

See merge request gitlab-org/gitlab-ce!18743

Add note about rebase/squash duplication in Gitaly

See merge request gitlab-org/gitlab-ce!18741

`InternalRedirect` prevents Open redirect issues by only allowing
redirection to paths on the same host.

It cleans up any unwanted strings from the path that could point to
another host (fe. //about.gitlab.com/hello). While preserving the
querystring and fragment of the uri.

It is already used by:

- `TermsController`
- `ContinueParams`
  - `ImportsController`
  - `ForksController`
- `SessionsController`: Only for verifying the host in CE. EE allows
   redirecting to a different instance using Geo.

This enforces the terms in the web application. These cases are
specced:

- Logging in: When terms are enforced, and a user logs in that has not
  accepted the terms, they are presented with the screen. They get
  directed to their customized root path afterwards.
- Signing up: After signing up, the first screen the user is presented
  with the screen to accept the terms. After they accept they are
  directed to the dashboard.
- While a session is active:
  - For a GET: The user will be directed to the terms page first,
    after they accept the terms, they will be directed to the page
    they were going to
  - For any other request: They are directed to the terms, after they
    accept the terms, they are directed back to the page they came
    from to retry the request. Any information entered would be
    persisted in localstorage and available on the page.

When a user accepts, we store this in the agreements to keep track of
which terms they accepted. We also update the flag on the user.

This will act as a cache, otherwise we would need to load the
`term_agreements` for a user on each request.

Using this field the result we're interested in is loaded when the
current user is loaded, without causing an extra query.

When terms are present, they can be viewed on `/-/users/terms`.

We will reuse the the dropdown, but exclude some menu items based on
permissions.

So moving the menu to a partial, and adding checks for each menu item here.

This allows admins to define terms in the application settings.

Every time the terms are adjusted, a new version is stored and becomes
the 'active' version. This allows tracking which specific version was
accepted by a user.

That way we can link a users acceptance of terms directly to a terms record.

Add a flag to applications settings to enforce users to accept terms
before using the GitLab instance

https://gitlab.com/gitlab-org/gitlab-ce/issues/23036

Inform the user when there are no project import options available

Closes #45987

See merge request gitlab-org/gitlab-ce!18716

Clarify location of Vue templates

See merge request gitlab-org/gitlab-ce!18733

Resolve "Reconcile project templates with Auto DevOps"

Closes #36762

See merge request gitlab-org/gitlab-ce!18737

Shared CI runners for groups

See merge request gitlab-org/gitlab-ce!9646

Perform a limited count for the badge counts for tabs in the Users admin area

Closes #33927

See merge request gitlab-org/gitlab-ce!18661

Update grape-entity 0.6.0 -> 0.7.1

See merge request gitlab-org/gitlab-ce!18720

Break issue title for board card title and issuable header text

Closes #45940

See merge request gitlab-org/gitlab-ce!18674

Add loading icon padding for pipeline environments

See merge request gitlab-org/gitlab-ce!18631

Move TimeTrackingSpentOnlyPane vue component

See merge request gitlab-org/gitlab-ce!18710

Add padding to profile description

Closes #35727

See merge request gitlab-org/gitlab-ce!18663

Added changes count to web IDE folder

See merge request gitlab-org/gitlab-ce!18452