Rollup merge of #103368 - compiler-errors:normalization-ambiguity-bug, r=oli-obk

Delay ambiguity span bug in normalize query iff not rustdoc

Oli and I decided that the compiler debt of adding another usage of `tcx.sess.opts.actually_rustdoc` is fine, because we don't really want to add more complexity to the normalize query, and moving rustdoc to use fulfill normalization (`fully_normalize`, i.e. not use the normalize query) is unnecessary overhead given that it's skipping binders and stuff.

r? oli-obk

Fixes #102827
Fixes #103181