Rollup merge of #74399 - mark-i-m:ty-err-4, r=eddyb

Move DelaySpanBugEmitted to ty::context

This makes it even hard to abuse.

r? @eddyb

cc @LeSeulArtichaut as this will probably conflict with your PR :/

diff --cc src/librustc_middle/ty/context.rs
Simple merge

diff --cc src/librustc_middle/ty/mod.rs
Simple merge

diff --cc src/librustc_middle/ty/sty.rs
Simple merge