Rollup merge of rust-lang#107169 - albertlarsan68:lock-in-pre-push, r=Mark-Simulacrum

Pass `--locked` to the x test tidy call

This allows to fail the push when the `Cargo.lock` file needs to be updated.

Author: matthiaskrgr

src/etc/pre-push.sh

@@ -14,4 +14,4 @@ ROOT_DIR="$(git rev-parse --show-toplevel)"
 echo "Running pre-push script $ROOT_DIR/x test tidy"
 
 cd "$ROOT_DIR"
-./x test tidy
+CARGOFLAGS="--locked" ./x test tidy