Backport of 10854-elasticsearch_avoid_db

See merge request gitlab-org/gitlab-ce!28579

Edit "SAML SSO" for SSOT

See merge request gitlab-org/gitlab-ce!29248

Edit Group's "Roadmap" for SSOT

See merge request gitlab-org/gitlab-ce!29245

Resolve "Inline validation for user's name and username length"

Closes #60323

See merge request gitlab-org/gitlab-ce!28095

Fix markdown for HA topic

See merge request gitlab-org/gitlab-ce!29244

Resolve "Default Web IDE's merge request checkbox to true"

Closes #60034

See merge request gitlab-org/gitlab-ce!28665

Introduce service for merge request pipeline creation

See merge request gitlab-org/gitlab-ce!28781

CE Backport: Show tree within Epic containing child Epics and Issues

See merge request gitlab-org/gitlab-ce!28787

Edit "Insights" content to meet SSOT guidelines

See merge request gitlab-org/gitlab-ce!29238

Edited "Epics" to comply with SSOT

See merge request gitlab-org/gitlab-ce!29236

Edited "Custom group-level project templates" for SSOT

See merge request gitlab-org/gitlab-ce!29235

Use the selected time window for metrics dashboard

See merge request gitlab-org/gitlab-ce!29152

Add note on weekly updates of dast Docker image

See merge request gitlab-org/gitlab-ce!29126

Allow BetterErrors REPL to be enabled

See merge request gitlab-org/gitlab-ce!29034

SSoT audit fixes for some topics in git section

Closes #61512

See merge request gitlab-org/gitlab-ce!28966

Implements part of the single source of truth audit
fixes for the topics/git section.

doc: add git mr command promotion

See merge request gitlab-org/gitlab-ce!28860

Update project security dashboard documentation

See merge request gitlab-org/gitlab-ce!28681

Avoid setting Gitlab::Session on sessionless requests and Git HTTP

See merge request gitlab-org/gitlab-ce!29146

CE backport for gitlab-ee!13389 (Support storing design blobs using LFS)

See merge request gitlab-org/gitlab-ce!29101

Docs: Tweak the wording regarding artifact completion

Closes #56470

See merge request gitlab-org/gitlab-ce!28880

[CE] Retry the first login page validation

Closes gitlab-org/quality/nightly#103

See merge request gitlab-org/gitlab-ce!29100

- Pull the new MR option out into it's own component
- Default MR checkbox to true when creating a new MR and committing to a
  branch that does not have an MR
- Still change the MR checkbox to false when a user is on a branch that
  already has an MR
- Hide MR option when on a branch that already has an MR and committing
  to current branch
- Don't default to true when committing directly to master

Edit "Group analytics" for SSOT

See merge request gitlab-org/gitlab-ce!29241

We don't have a way to create MR pipeline today, this is one
of the headaches for users.
This change is a preliminary work for the capability.

It can take longer that 60 seconds for the server to be ready to
respond. Retry the login page validation twice (i.e., 3 attempts
to validate the login page)

Edit contribution analytics for SSOT

See merge request gitlab-org/gitlab-ce!29180