fix(runtime-vapor): reset insertion state to avoid duplicate block inserts during non-hydration

[edison1105]

// <template>
//   <button @click="show=!show"> toggle </button>
//   <div>
//     <Comp v-if="show"/>
//   </div>
// </template>

function render(_ctx, $props, $emit, $attrs, $slots) {
  const n0 = t0()
  const n4 = t1()
  _setInsertionState(n4)
  const n1 = _createIf(() => (_ctx.show), () => {
    const n3 = _createComponent(_ctx.Comp)
    return n3
  })
  n0.$evtclick = () => (_ctx.show=!_ctx.show)
  return [n0, n4]
}

The block of n3 will be inserted twice due to the following code in both apiCreateIf.ts and component.ts

if (!isHydrating && _insertionParent) {
  insert(xxx, _insertionParent, _insertionAnchor)
}

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commit: 619420c