Rollup merge of #133029 - veluca93:abi-checks-tier3, r=workingjubilee

ABI checks: add support for some tier3 arches, warn on others.

Followup to
- https://github.com/rust-lang/rust/pull/132842
- https://github.com/rust-lang/rust/pull/132173
- https://github.com/rust-lang/rust/issues/131800

r? ``@workingjubilee``

compiler/rustc_monomorphize/src/mono_checks/abi_check.rs

@@ -36,9 +36,7 @@ fn do_check_abi<'tcx>(
     target_feature_def: DefId,
     mut emit_err: impl FnMut(Option<&'static str>),
 ) {
-    let Some(feature_def) = tcx.sess.target.features_for_correct_vector_abi() else {
-        return;
-    };
+    let feature_def = tcx.sess.target.features_for_correct_vector_abi();
     let codegen_attrs = tcx.codegen_fn_attrs(target_feature_def);
     for arg_abi in abi.args.iter().chain(std::iter::once(&abi.ret)) {
         let size = arg_abi.layout.size;