Auto merge of #125434 - nnethercote:rm-more-extern-tracing, r=jackh726

Remove more `#[macro_use] extern crate tracing`

Because explicit importing of macros via use items is nicer (more standard and readable) than implicit importing via `#[macro_use]`. Continuing the work from #124511 and #124914.

r? `@jackh726`

compiler/rustc_const_eval/src/interpret/eval_context.rs

@@ -2,6 +2,7 @@ use std::cell::Cell;
 use std::{fmt, mem};
 
 use either::{Either, Left, Right};
+use tracing::{debug, info, info_span, instrument, trace};
 
 use hir::CRATE_HIR_ID;
 use rustc_errors::DiagCtxt;