Enable pulley simd fuzzing

Pulley finished its simd implementation in bytecodealliance#9935 so now that fuzzing was
enabled in bytecodealliance#9966 as well be sure to fuzz the simd proposal too.

crates/fuzzing/src/generators/config.rs

@@ -587,7 +587,6 @@ impl WasmtimeConfig {
             }
 
             CompilerStrategy::CraneliftPulley => {
-                config.simd_enabled = false;
                 config.threads_enabled = false;
             }
         }