(gitlab-docs) Clean up docs redirects - 2024-03-22

Monthly cleanup of docs redirects.

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 Docs project maintenance tasks, March 2024 (technical-writing#1006 - closed)