Rollup merge of #124511 - nnethercote:rm-extern-crates, r=fee1-dead

Remove many `#[macro_use] extern crate foo` items

This requires the addition of more `use` items, which often make the code more verbose. But they also make the code easier to read, because `#[macro_use]` obscures where macros are defined.

r? `@fee1-dead`

compiler/rustc_middle/src/mir/coverage.rs

@@ -1,7 +1,7 @@
 //! Metadata from source code coverage analysis and instrumentation.
 
 use rustc_index::IndexVec;
-use rustc_macros::HashStable;
+use rustc_macros::{HashStable, TyDecodable, TyEncodable, TypeFoldable, TypeVisitable};
 use rustc_span::{Span, Symbol};
 
 use std::fmt::{self, Debug, Formatter};