Backport Git-env code from EE "Fix push rules on Git 2.11" (gitlab-org/gitlab-ee!1525)

See merge request !10547

Document how polling interval multiplier is used

Closes #30686

See merge request !10592

Add vue loader

Closes #29519

See merge request !10517

[ci skip]

Reuse "merge_requests_for_nodes" in "MergeRequestParser"

See merge request !10585

Remove broken link on gitlab_flow.md

Closes #25274

See merge request !10590

Update todos.md

Closes #30528

See merge request !10557

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

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

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

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

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

Added back in the CI status favicon

See merge request !10534

Remove limited container on file view

See merge request !10542

Add information about namespace encoding to API docs

Closes #25722

See merge request !10536

[ci skip]

Add spec for schema.rb

Closes #21978

See merge request !10580

Test all enabled routes in ETag caching middleware and fix pipeline routes

Closes #30563

See merge request !10535

Fix email not being sent after project export

Closes #30676

See merge request !10578

Looks like it was removed with a bad merge conflict resolution

Extract route matching logic to Gitlab::EtagCaching::Router.

Fix pipeline routes:
1. "project_pipelines" has to come after "commit_pipelines" and
"merge_request_pipelines" because it is more generic
2. "commit_pipelines": "\s" (any whitespace character) => "\S"
(any non-whitespace character).

Clean carrierwave tempfiles

Closes #28540

See merge request !9466

Refactor javascript behaviors directory

See merge request !10439