Put param_env into infcx.

Because they get passed around together a lot.

compiler/rustc_borrowck/src/diagnostics/move_errors.rs

@@ -305,7 +305,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
         let Some(copy_trait_def) = self.infcx.tcx.lang_items().copy_trait() else { return false };
         // This is only going to be ambiguous if there are incoherent impls, because otherwise
         // ambiguity should never happen in MIR.
-        self.infcx.type_implements_trait(copy_trait_def, [ty], self.param_env).may_apply()
+        self.infcx.type_implements_trait(copy_trait_def, [ty], self.infcx.param_env).may_apply()
     }
 
     fn report_cannot_move_from_static(&mut self, place: Place<'tcx>, span: Span) -> Diag<'infcx> {