When an error occurs during merge, the error message is exposed to user
and it is also saved in DB. This error message may be user unfriendly
(as in !41820) and it could also expose a detailed backend information.

Instead of displaying the specific error message, only sanitized generic
message is displayed. This is potentially controversial change because
disadvantage is that user doesn't get specific reason of failure.

Additional changes:
* repository.merge including exceptions is is extracted into a
separate method to make things clearer
* update! is used instead of update so we don't silently ignore
an error

Related to !41857

Fix example config miss-alignment in uploads.object_store.connection

Closes gitlab-development-kit#342

See merge request gitlab-org/gitlab-ce!18622

Resolve "Add how to use nip.io to Auto DevOps and Kubernetes documentation"

Closes #45561

See merge request gitlab-org/gitlab-ce!18494

Remove IDE image upload spec

Closes #45045

See merge request gitlab-org/gitlab-ce!18617

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/45045

Remove comma from the time system notes

See merge request gitlab-org/gitlab-ce!18593

Repository#exists? can only be queried with Gitaly

Closes gitaly#314

See merge request gitlab-org/gitlab-ce!18567

Don't run JS lint report for QA

See merge request gitlab-org/gitlab-ce!18621

Add gitlab-pages admin ping rake task

See merge request gitlab-org/gitlab-ce!18372

Skip db related tests for QA

See merge request gitlab-org/gitlab-ce!18618

CE: Fix QA protected branches tests

See merge request gitlab-org/gitlab-ce!18585

and skip db related jobs for QA branches

Fix rubocop offense and enable jobs for qa

See merge request gitlab-org/gitlab-ce!18613

while producing products. Basically an attempt to fix:
https://gitlab.com/gitlab-org/gitlab-qa/-/jobs/65016456

Selenium::WebDriver::Error::StaleElementReferenceError:
  stale element reference: element is not attached to the page document

in:

``` ruby
product :name do
  Page::Project::Settings::Repository.act do
    expand_protected_branches(&:last_branch_name)
  end
end
```

Fixed typos

See merge request gitlab-org/gitlab-ce!18432

We could revisit which we don't want to run in qa.

CE Backport: Reveal labels dropdown when labels icon is clicked on collapsed Epic sidebar

See merge request gitlab-org/gitlab-ce!18611

Add more QA SSH key tests

Closes gitlab-qa#183

See merge request gitlab-org/gitlab-ce!17662

Clear refresh interval when MRWidgetFailedToMerge component is destroyed

See merge request gitlab-org/gitlab-ce!18600

Reset milestone filter when clicking "Any Milestone" in dashboard

Closes #45295

See merge request gitlab-org/gitlab-ce!18531

Remove `peek-performance_bar` from the performance bar

See merge request gitlab-org/gitlab-ce!18597

Rename the Edge label to Quality

See merge request gitlab-org/gitlab-ce!18457

Delete object_state_models.md

See merge request gitlab-org/gitlab-ce!18588

Fix calendar day position

See merge request gitlab-org/gitlab-ce!18516

Restore size and position for fork icon

See merge request gitlab-org/gitlab-ce!18449

Fixed bugs with IDE new directory

Closes #44838

See merge request gitlab-org/gitlab-ce!18274

Merge branch '45451-user-deletion-modal-with-same-info-for-delete-user-or-delete-user-and-contributions' into 'master'

Resolve "User deletion modal with same info for delete user / delete user and contributions"

Closes #45451

See merge request gitlab-org/gitlab-ce!18463