Docs: update GFM guide

See merge request gitlab-org/gitlab-ce!22719

Send continue parameter on for `cancel_path`

Closes #53335

See merge request gitlab-org/gitlab-ce!22712

Remove EE-specific code from 'Discussion' models

See merge request gitlab-org/gitlab-ce!22687

We are using hash[symbol][symbol] everywhere else in the test file.

In https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/21595
`ContinueParams` was introducted in the `Projects::JobController#cancel`
since `continue` parameter is not present for in `cancel_path` for
`Projects::JobController#show.sjon` the user is being redirect to the
pipeline page, where it should be redirected to the current job page
instead.

Add the `continue` parameter as a query string for `cancel_path`.

Remove gitlab-ui's pagination from global

See merge request gitlab-org/gitlab-ce!22704

Remove gitlab-ui's modal from global

See merge request gitlab-org/gitlab-ce!22706

Fix typos in IDE props

See merge request gitlab-org/gitlab-ce!22685

Adds required prop to the post merge pipeline

Closes #53386

See merge request gitlab-org/gitlab-ce!22715

Split CE and EE params in issues API

See merge request gitlab-org/gitlab-ce!22689

Two different MRs updating the same code were merged
and this was not caught prior to merge.
This MR adds the missing prop to the post merge pipeline

Document implicit feature flag checks

Closes gitlab-org/release/framework#26

See merge request gitlab-org/gitlab-ce!22669

Merge branch '41545-gitlab-merge-request-status-could-not-connect-to-the-ci-server-please-check-your-settings-and-try-again' into 'master'

Resolve "Reword error message for internal CI unknown pipeline status"

Closes #53056

See merge request gitlab-org/gitlab-ce!22474

Add instructions to find the usage ping payload

See merge request gitlab-org/gitlab-ce!22571

CE: Absorb product into factory

See merge request gitlab-org/gitlab-ce!22698

Refactor the backup/restore docs

See merge request gitlab-org/gitlab-ce!22576

Added info on getting k8s integration for existing cluster

See merge request gitlab-org/gitlab-ce!21783

Fix broken ie11 due to non-transpiled components in gitlab-ui

Closes #53052

See merge request gitlab-org/gitlab-ce!22695

Add language param to highlight

See merge request gitlab-org/gitlab-ce!21584

Move Repository#wrapped_gitaly_errors into concern

See merge request gitlab-org/gitlab-ce!22691

Fix structure and add  notification level

See merge request gitlab-org/gitlab-ce!22528

- Rearrange sections
- Stress out the importance of storing config files
- Add troubleshooting guide in case secrets is lost

Enable some frozen string for lib/gitlab/ci

See merge request gitlab-org/gitlab-ce!22636

Fix application layout form description

See merge request gitlab-org/gitlab-ce!22658

Resolve "Create new group: Rename form fields and update UI"

Closes #50962

See merge request gitlab-org/gitlab-ce!22418

Fix search "all in GitLab" not working with relative URLs

Closes #53259

See merge request gitlab-org/gitlab-ce!22644

Adds missing i18n to pipelines table

See merge request gitlab-org/gitlab-ce!22690

Having this in a concern allows us to reuse it for different single
purpose classes that call out to git without going through the
repository every time.