Rollup merge of #136271 - Sky9x:debug-maybeuninit-footgun, r=tgross35

Remove minor future footgun in `impl Debug for MaybeUninit`

No longer breaks if `MaybeUninit` moves modules (technically it could break if `MaybeUninit` were renamed but realistically that will never happen)

Debug impl originally added in #133282

Author: matthiaskrgr