Rollup merge of #106175 - compiler-errors:bad-import-sugg, r=oli-obk

Fix bad import suggestion with nested `use` tree

Fixes #105566
Fixes #105373

Ideally, we'd find some way to turn these into structured suggestions -- perhaps on a separate line as a different `use` statement, but I have no idea how to access the span for the whole `use` from this point in the import resolution code.

Author: Yuki Okushi