Improve docs about pipeline variables expressions

Closes #44786

See merge request gitlab-org/gitlab-ce!18195

Fix environment deployment platform filter method

See merge request gitlab-org/gitlab-ce!18216

Remove support for legacy tar.gz pages artifacts

See merge request gitlab-org/gitlab-ce!18090

Implement a new SHA partial for commit lists

Closes #42448

See merge request gitlab-org/gitlab-ce!17406

Resolve "Show a message when loading the issues / merge requests dashboard without filters"

Closes #43246

See merge request gitlab-org/gitlab-ce!17961

Add a note to plugins.md about contributing back to GitLab

See merge request gitlab-org/gitlab-ce!18215

[ci skip]

Update GitLab.com settings with current state

See merge request gitlab-org/gitlab-ce!18209

Cache personal projects count.

Closes #37462

See merge request gitlab-org/gitlab-ce!18197

Performance improvements warrants a changelog entry.

See merge request gitlab-org/gitlab-ce!18218

[Rails5] Update `type_cast_*_database`  methods

See merge request gitlab-org/gitlab-ce!18188

Closes #37462.

Resolve "Follow-up from "Refactor discussions/notes code""

Closes #44939

See merge request gitlab-org/gitlab-ce!18190

Add confirmation modal to "Change username"

Closes #41758

See merge request gitlab-org/gitlab-ce!17405

Show issues of subgroups in group-level issue board

Closes #44270

See merge request gitlab-org/gitlab-ce!18187

Deleting a MR you are assigned to should decrements counter

Closes #44458

See merge request gitlab-org/gitlab-ce!17951

Update index.md to describe leaving out the host in prometheus['listen_address']…

See merge request gitlab-org/gitlab-ce!18207

Include subgroup issues when searching for group issues using the API

Closes #42443

See merge request gitlab-org/gitlab-ce!18068

Resolve "Access token copy to clipboard button has wrong style"

Closes #43976

See merge request gitlab-org/gitlab-ce!17978

Polish design of domain verification for Gitlab Pages

Closes #43215

See merge request gitlab-org/gitlab-ce!17767

Use the GitLab version as part of the appearances cache key

Closes gitlab-ee#5571

See merge request gitlab-org/gitlab-ce!18211

Override Prometheus service name to fix integration with GitLab.

Closes #45070

See merge request gitlab-org/gitlab-ce!18206

Resolve "Show `failure_reason` and upgrade tooltips of jobs"

Closes #44269

See merge request gitlab-org/gitlab-ce!17782