fix display comment avatars issue in IE 11

Closes #56931

See merge request gitlab-org/gitlab-ce!24777

Create security release MR template

Closes gitlab-org/release/framework#168, gitlab-org/release/framework#166, and gitlab-org/release/framework#167

See merge request gitlab-org/gitlab-ce!24725

Pass build variables downstream / CE port

See merge request gitlab-org/gitlab-ce!24762

Support passing bridge variables to downstream pipeline

See merge request gitlab-org/gitlab-ee!9302

Fix cluster installation processing spinner

Closes #56398

See merge request gitlab-org/gitlab-ce!24485

Pass $CI_COMMIT_TAG as GITLAB_TAG to the CNG triggered pipelines

See merge request gitlab-org/gitlab-ce!24639

Expose app version to frontend

See merge request gitlab-org/gitlab-ce!24791

Add the type of buyer to feature proposal

See merge request gitlab-org/gitlab-ee!7940

Track JIRA dev panel integration

Closes #7444

See merge request gitlab-org/gitlab-ee!8949

Prefer to use overrides on PipelinesController

See merge request gitlab-org/gitlab-ce!24793

Support bamboo api polymorphism

See merge request gitlab-org/gitlab-ce!24680

CE: Resolve "Extract EE specific files/lines for some project CI views"

See merge request gitlab-org/gitlab-ce!24774

Separate BE roadmaps sort from epics sort

Closes #8933

See merge request gitlab-org/gitlab-ee!9281

Add support for launching Epic create UI from Epic app

Closes #7752

See merge request gitlab-org/gitlab-ee!9331

Add OpenTracing instrumentation for Action View Render events

See merge request gitlab-org/gitlab-ce!24728

Docs: Releases permissions

Closes #56471

See merge request gitlab-org/gitlab-ce!24766

This change adds three new instrumentations, driven through rails
notifications: render_template.action_view,
render_collection.action_view and render_partial.action_view.

These can help developers understand why renders are taking a long
time which may in turn help them to improve their performance.

Adds support for launching Epic create UI through refactored Epic app.
Feature is currently behind same cookie flag
which is used for refactored Epic app.

Fix Bitbucket Server import not allowing personal projects

Closes #53419

See merge request gitlab-org/gitlab-ce!23601

Fix several ActionController::Parameters deprecations

See merge request gitlab-org/gitlab-ee!9347

Fix deprecation: uniq is deprecated and will be removed from Rails 5.1

See merge request gitlab-org/gitlab-ee!9348

Replace deprecated render text

See merge request gitlab-org/gitlab-ee!9346