cranelift: Don't log CLIF and assembly at debug level (#4503)

Too verbose. Only log them at trace level.

cranelift/codegen/src/context.rs

@@ -133,7 +133,7 @@ impl Context {
         self.verify_if(isa)?;
 
         let opt_level = isa.flags().opt_level();
-        log::debug!(
+        log::trace!(
             "Compiling (opt level {:?}):\n{}",
             opt_level,
             self.func.display()