Upgrade toolchain to 2024-09-07 (#3504)

Relevant upstream PR:

rust-lang/rust#128776: The `TreatParams` enum
variants were renamed.

Resolves #3503 

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under the terms of the Apache 2.0 and MIT licenses.

kani-compiler/src/kani_middle/resolve.rs

@@ -586,7 +586,8 @@ where
         debug!(?name, ?ty, "resolve_in_primitive");
         let internal_ty = rustc_internal::internal(tcx, ty);
         let simple_ty =
-            fast_reject::simplify_type(tcx, internal_ty, TreatParams::AsCandidateKey).unwrap();
+            fast_reject::simplify_type(tcx, internal_ty, TreatParams::InstantiateWithInfer)
+                .unwrap();
         let impls = tcx.incoherent_impls(simple_ty).unwrap();
         // Find the primitive impl.
         let item = impls

rust-toolchain.toml

@@ -2,5 +2,5 @@
 # SPDX-License-Identifier: Apache-2.0 OR MIT
 
 [toolchain]
-channel = "nightly-2024-09-06"
+channel = "nightly-2024-09-07"
 components = ["llvm-tools", "rustc-dev", "rust-src", "rustfmt"]