Move all error reporting into rustc_trait_selection

compiler/rustc_trait_selection/src/lib.rs

@@ -22,11 +22,14 @@
 #![feature(control_flow_enum)]
 #![feature(extract_if)]
 #![feature(if_let_guard)]
+#![feature(iter_intersperse)]
 #![feature(let_chains)]
 #![feature(never_type)]
 #![feature(rustdoc_internals)]
+#![feature(try_blocks)]
 #![feature(type_alias_impl_trait)]
 #![feature(unwrap_infallible)]
+#![feature(yeet_expr)]
 #![recursion_limit = "512"] // For rustdoc
 // tidy-alphabetical-end