chore(consumers): Bump Rust toolchain version (#7252)

Bumps the Rust toolchain version to the latest stable. Bumping to >=1.85
is one of the solutions to proceed with
#7250

Also fixes the new lints.

Author: lcian

rust_snuba/rust-toolchain.toml

@@ -1,2 +1,2 @@
 [toolchain]
-channel = "1.83.0"
+channel = "1.85.0"

rust_snuba/src/consumer.rs

@@ -557,7 +557,14 @@ pub fn consumer_impl(
     }
 }
 
-pyo3::create_exception!(rust_snuba, SnubaRustError, pyo3::exceptions::PyException);
+#[expect(
+    unexpected_cfgs,
+    reason = "Fixed in pyo3 v0.23, see https://github.com/PyO3/pyo3/issues/4743"
+)]
+mod exceptions {
+    pyo3::create_exception!(rust_snuba, SnubaRustError, pyo3::exceptions::PyException);
+}
+use exceptions::*;
 
 /// insert: encoded rows
 type PyInsert = PyObject;

rust_snuba/src/strategies/python.rs

@@ -246,7 +246,7 @@ impl ProcessingStrategy<KafkaPayload> for PythonTransformStep {
                     message: transformed_message,
                 })) => {
                     self.transformed_messages.push_front(transformed_message);
-                    if deadline.map_or(false, |d| d.has_elapsed()) {
+                    if deadline.is_some_and(|d| d.has_elapsed()) {
                         tracing::warn!("Timeout reached");
                         break;
                     }