CE Backport: Fix unleash server side cannot return feature flags

See merge request gitlab-org/gitlab-ce!25185

Fix unleash server side cannot return feature flags

Closes #9738

See merge request gitlab-org/gitlab-ee!9532

Apply nice suggestions

Add changelog

Improve coding style

Add checks to prevent cycling hierarchy

Closes #9586

See merge request gitlab-org/gitlab-ee!9438

Docs: Fixing path in links in api release doc

See merge request gitlab-org/gitlab-ce!24975

Fix a typo in ./doc/ci/examples/deploy_spring_boot_to_cloud_foundry/index.md from "deafult" to "default".

See merge request gitlab-org/gitlab-ce!25153

Update what supports U2F workflow

See merge request gitlab-org/gitlab-ce!25047

Upgrade gitaly to 1.19.1

See merge request gitlab-org/gitlab-ce!25177

Merge branch '57604-checking-a-box-in-an-issue-description-consistently-throws-an-error-on-11-8-0-rc2' into 'master'

Checking a box in an issue description consistently throws an error

Closes #57604

See merge request gitlab-org/gitlab-ce!25174

Convert noteable_note_spec.js to Vue test utils

See merge request gitlab-org/gitlab-ce!24983

(cherry picked from commit 861f93e6)

Convert noteable_note_spec.js to Vue test utils (EE-port)

See merge request gitlab-org/gitlab-ee!9470

(cherry picked from commit 861f93e6)

Merge branch '57426-review-apps-some-merge-related-tests-fail-in-review-qa-jobs-but-not-in-package-and-qa' into 'master'

Fix a Ruby 2.4 incompatibility in Ci::CreatePipelineService

Closes #57426

See merge request gitlab-org/gitlab-ce!25168

Signed-off-by: Rémy Coutable <remy@rymai.me>

Fix overlapping empty-header logo

Closes #56347

See merge request gitlab-org/gitlab-ce!24868

Notable changes proposed by @pslaughter

Fix broken links on help page

Closes #57554

See merge request gitlab-org/gitlab-ce!25120

Log queue duration in production_json.log

Closes #57420

See merge request gitlab-org/gitlab-ce!25075

Change unicode for non-standard spaces

See merge request gitlab-org/gitlab-ce!24795

Remove fast_destroy_uploads feature flag

Closes #54937

See merge request gitlab-org/gitlab-ce!24930

Transforming Gfm also on paste so it works also in FF

Closes #57561

See merge request gitlab-org/gitlab-ce!25146