fix(runtime-core): avoid inlining isShallow (#10238)

Author: sxzz

packages/runtime-core/src/customFormatter.ts

@@ -1,6 +1,12 @@
-import { type Ref, isReactive, isReadonly, isRef, toRaw } from '@vue/reactivity'
+import {
+  type Ref,
+  isReactive,
+  isReadonly,
+  isRef,
+  isShallow,
+  toRaw,
+} from '@vue/reactivity'
 import { EMPTY_OBJ, extend, isArray, isFunction, isObject } from '@vue/shared'
-import { isShallow } from '../../reactivity/src/reactive'
 import type { ComponentInternalInstance, ComponentOptions } from './component'
 import type { ComponentPublicInstance } from './componentPublicInstance'