Rollup merge of #127146 - compiler-errors:fast-reject, r=lcnr

Uplift fast rejection to new solver

Self explanatory.

r? lcnr

compiler/rustc_trait_selection/src/traits/coherence.rs

@@ -121,7 +121,7 @@ pub fn overlapping_impls(
     // Before doing expensive operations like entering an inference context, do
     // a quick check via fast_reject to tell if the impl headers could possibly
     // unify.
-    let drcx = DeepRejectCtxt { treat_obligation_params: TreatParams::AsCandidateKey };
+    let drcx = DeepRejectCtxt::new(tcx, TreatParams::AsCandidateKey);
     let impl1_ref = tcx.impl_trait_ref(impl1_def_id);
     let impl2_ref = tcx.impl_trait_ref(impl2_def_id);
     let may_overlap = match (impl1_ref, impl2_ref) {

compiler/rustc_trait_selection/src/traits/select/candidate_assembly.rs

@@ -571,7 +571,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
             return;
         }
 
-        let drcx = DeepRejectCtxt { treat_obligation_params: TreatParams::ForLookup };
+        let drcx = DeepRejectCtxt::new(self.tcx(), TreatParams::ForLookup);
         let obligation_args = obligation.predicate.skip_binder().trait_ref.args;
         self.tcx().for_each_relevant_impl(
             obligation.predicate.def_id(),