fix(warning): ensure prod hydration warnings actually work

packages/runtime-core/src/warning.ts

@@ -31,7 +31,7 @@ export function popWarningContext() {
 }
 
 export function warn(msg: string, ...args: any[]) {
-  if (!__DEV__) return
+  if (!__DEV__ && !__FEATURE_PROD_HYDRATION_MISMATCH_DETAILS__) return
 
   // avoid props formatting or warn handler tracking deps that might be mutated
   // during patch, leading to infinite recursion.