Fix clippy error by ignoring stack_switchings and exceptions in the f…

…uzz generators' test config.

crates/fuzzing/src/generators/config.rs

@@ -140,6 +140,8 @@ impl Config {
             hogs_memory: _,
             nan_canonicalization: _,
             gc_types: _,
+            exceptions: _,
+            stack_switching: _,
         } = test.config;
 
         // Enable/disable some proposals that aren't configurable in wasm-smith