Add a boot menu entry with debug, nosplash, and without quiet
wiki/src/doc/first_steps/start/not_entirely.inline.mdwn we instruct users to replace
debug nosplash. The goal being to help the user gather useful information, for pre-X.Org boot failures, that they can then report to Help Desk.
@numbat suggested that we add a boot menu entry that does exactly this. I agree: it would be easier for users to follow these instructions, and for Help Desk to point to them. But I believe #17862 will obsolete these idea, so let's wait until we have reached a conclusion there first.
Blocked by #16677