[CE backport] Document SAST and Dependency Scanning report JSON format

See merge request gitlab-org/gitlab-ce!29303

Expose default_git_depth via project API

Closes #62908

See merge request gitlab-org/gitlab-ce!29353

Quarantine Auto DevOps spec

See merge request gitlab-org/gitlab-ce!29542

Rename `BatchCommitLoader` to `BatchLfsOidLoader`

See merge request gitlab-org/gitlab-ce!29487

CE backport for gitlab-org/gitlab-ee!12309: Remove merge request pipeline check in mergeable method

See merge request gitlab-org/gitlab-ce!29074

CE backport for gitlab-org/gitlab-ee!12156: Update the merge request widget's "Merge" button to support merge trains

See merge request gitlab-org/gitlab-ce!27594

Merge branch '62300-target-area-for-dropdown-list-items-is-too-small-on-metrics-dashboard' into 'master'

Resolve "Target area for dropdown list items is too small on Metrics Dashboard"

Closes #62300

See merge request gitlab-org/gitlab-ce!29458

Enable Get and Update of ci_default_git_depth for
Project API.

Renaming Project#default_git_depth to :ci_default_git_depth
to give more context through the API usage.

Add API documentation

Removes the "target branch advanced" warning from the frontend
as it is no longer needed due to the new merge trains feature.

Update Serverless.gitlab-ci-yml to fix lint warning

See merge request gitlab-org/gitlab-ce!29396