GitLab's Spamcheck service does not have authentication support on its
own. So, on single-node omnibus-gitlab installations it runs
unauthenticated over localhost. In this scenario, any random text, as
long as it is not blank, will work as an API key. But, this doesn't look
nice from a documentation perspective. Nor does it reflect the current
realit with respect to authentication. Hence, removing the requirement
of an API key to use external Spamcheck service at least until Spamcheck
can do authentication on its own. Once that is the case, we can make
omnibus use authentication for the connection over localhost and turn
this requirement back on.

Changelog: changed
Signed-off-by: Balasankar "Balu" C <balasankar@gitlab.com>

Improve docs style of Pages custom domain

See merge request gitlab-org/gitlab!76041

Deployment Approvals data model

See merge request gitlab-org/gitlab!74932

Document version of Setuptools tested with Dependency Scanning

See merge request gitlab-org/gitlab!76176

Document on-demand scans tabs

See merge request gitlab-org/gitlab!75723

Do not log explicit Gitlab::SidekiqStatus.set calls

See merge request gitlab-org/gitlab!76250

Ensure Jira users and labels have `id` attribute

See merge request gitlab-org/gitlab!75966

A recent change to Apollo means we require IDs for 
every GraphQL object.

Jira labels and users did not include IDs.

This MR ensures Jira labels and users have `id` 
field defined.

https://gitlab.com/gitlab-org/gitlab/-/issues/347162

Changelog: fixed
EE: true

Put vulnerability finding link ingestion behind feature flag

See merge request gitlab-org/gitlab!76167

Clarify (lack of) retention policy for Audit Events in the docs

See merge request gitlab-org/gitlab!76275

Improve headings structure on Iterations page

See merge request gitlab-org/gitlab!76156

Remove tier text from documentation

See merge request gitlab-org/gitlab!76241

Update acronym rule to reflect actual usage

See merge request gitlab-org/gitlab!76185

Add documentation for streaming events

See merge request gitlab-org/gitlab!76114

Document the size limit on Cobertura XML files

See merge request gitlab-org/gitlab!76159

Fixed docs warnings detected by the vale Acronym rule

See merge request gitlab-org/gitlab!76048

Clarify how artifacts are locked and unlocked

See merge request gitlab-org/gitlab!75849

Doc: Dependency paths are supported for Sbt

See merge request gitlab-org/gitlab!76249

Removed italics and changed permissions to role

See merge request gitlab-org/gitlab!76276

Add setting to store future subscriptions

See merge request gitlab-org/gitlab!75716

This is for self-managed EE to store an array of JSON objects.
ApplicationSetting is used instead of a new table because this will be
overwritten during each sync, and won't be updated.

There will ever store a handful of items and are displayed as a whole.

Changelog: added

Limit snippet blob height to 500px

See merge request gitlab-org/gitlab!75942

E2E: Validate error presence for group imports

See merge request gitlab-org/gitlab!76085

Update Deprecations issue to template add breaking changes label

See merge request gitlab-org/gitlab!75699

Resolve "Linear queries for GroupsFinder"

See merge request gitlab-org/gitlab!67650

Quarantine flaky test

See merge request gitlab-org/gitlab!76268