Rollup merge of rust-lang#92360 - jackh726:param-heuristics-1, r=davidtwco

Some cleanups around check_argument_types

Split out in ways from my rebase/continuation of rust-lang#71827

Commits are mostly self-explanatory and these changes should be fairly straightforward

Author: matthiaskrgr

compiler/rustc_typeck/src/check/callee.rs

@@ -496,7 +496,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             call_expr.span,
             call_expr,
             fn_sig.inputs(),
-            &expected_arg_tys,
+            expected_arg_tys,
             arg_exprs,
             fn_sig.c_variadic,
             TupleArgumentsFlag::DontTupleArguments,
@@ -529,7 +529,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             call_expr.span,
             call_expr,
             fn_sig.inputs(),
-            &expected_arg_tys,
+            expected_arg_tys,
             arg_exprs,
             fn_sig.c_variadic,
             TupleArgumentsFlag::TupleArguments,