Fix jest failure in Vue3

What does this MR do and why?

closes #3336 (closed)

Vue3 in using a _cache as second param of a compiled render function to cache handlers on vdom, see example

template

<button type="button" id="btnIncrement" @click="increment">
   Increment
</button>

compiled render function

export function render(_ctx, _cache) {
  return (_openBlock(), _createBlock("button", {
    type: "button",
    id: "btnIncrement",
    onClick: _cache[1] || (
     _cache[1] = ($event, ...args) => (_ctx.increment($event, ...args))
    )
  }, "Increment"))
}

thus, while we are calling upstream render function without passing _cache param, errors will throw if there is a listener on the root element of the component.

This MR adds a empty _cache object for every render function calling.

And in app/assets/javascripts/groups/components/group_folder.vue the group-item is not registered, there is some bug if we call upstream render function, so this MR rewrite the prop to make v-if on group_folder to be false, which does not affect the test case.

Screenshots or screen recordings

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Before	After

How to set up and validate locally

env VUE_VERSION=3 yarn run jest 'jh/spec/frontend/groups/components/group_item_spec.js'

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