Clean up docs redirects - 2024-05-24

Monthly cleanup of docs redirects: Docs project maintenance tasks, May 2024 (technical-writing#1028 - closed)

See https://about.gitlab.com/handbook/product/ux/technical-writing/#regularly-scheduled-tasks

_Created automatically: https://gitlab.com/gitlab-org/gitlab-docs/-/blob/main/doc/raketasks.md#clean-up-redirects_

Related to gitlab!154133 (merged).