Update markdown lint style and option files

See merge request gitlab-org/gitlab-ce!30595

Add commented lines explaining the file, and including
rules that should pass already, and commented out rules
that can be added in the future, for reference.

Remove extra blank lines from docs

See merge request gitlab-org/gitlab-ce!30650

Removing extra blank lines in docs that serve
no purpose, as well as some --- lines that also
are not needed.

Remove deprecated docs sections of Secure jobs

Closes #63739

See merge request gitlab-org/gitlab-ce!30527

Remove trailing whitespace in docs (part 2)

See merge request gitlab-org/gitlab-ce!30649

Remove unneeded trailing whitespace in lines in
/security /workflow /user docs

Single codebase: Remove an extra whitespace in test files

See merge request gitlab-org/gitlab-ce!30710

Partial CE backport of https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/10565Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

Fix typo "beetween" in timeout validation message

See merge request gitlab-org/gitlab-ce!30705

Unquarantine previously failing autodevops spec

Closes gitlab-org/quality/nightly#108

See merge request gitlab-org/gitlab-ce!30691

CE backport of reply button tracker refactor

See merge request gitlab-org/gitlab-ce!28298

Resolve "Snowplow tracking for notes does not work in Firefox"

Closes #11470

See merge request gitlab-org/gitlab-ee!12578

Removed check for composed path in the event listner

create_project_with_auto_devops_spec.rb # runs autodevops
was previous failing

This previously failing test has passed consecutively

Move functions for multiple boards in BoardService to core  (CE-backport)

See merge request gitlab-org/gitlab-ce!30624

(cherry picked from commit 9dbefac95a8b60b93ba7b05fd7bf69b80b395f54)

Rename design management feature flag

See merge request gitlab-org/gitlab-ee!14658

This avoids the bug in
https://gitlab.com/gitlab-org/gitlab-ce/issues/64468

Move functions for multiple boards in BoardService to core

See merge request gitlab-org/gitlab-ee!14644

CE port of "Fix page refresh in retry_until"

See merge request gitlab-org/gitlab-ce!30656

Fix page refresh in retry_until

Closes gitlab-org/quality/nightly#115

See merge request gitlab-org/gitlab-ee!14659

Update lodash to 4.7.14 and lodash.mergewith to 4.6.2

Closes #64416

See merge request gitlab-org/gitlab-ce!30602

Fix Project Badge Buttons

See merge request gitlab-org/gitlab-ce!30678

z-index fixed for diff file dropdown

See merge request gitlab-org/gitlab-ce!30657

Correct the border colour of the count badge buttons.