feat(vue3): allow to have multiple Vue 3 setup()

[gierschv]

What I did

I'm using storybook-vue3-router which uses the vue3 renderer setup call, and overrides my call to setup() that I use to setup pinia.

This PR allows to have multiple setup() functions defined and called during the Vue 3 app setup.

How to test

Checklist

• Make sure your changes are tested (stories and/or unit, integration, or end-to-end tests)
• Make sure to add/update documentation regarding your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Maintainers

• If this PR should be tested against many or all sandboxes,
  make sure to add the ci:merged or ci:daily GH label to it.
• Make sure this PR contains one of the labels below.

["cleanup", "BREAKING CHANGE", "feature request", "bug", "documentation", "maintenance", "dependencies", "other"]

[chakAs3]

Hi @gierschv thank you for your contribution and your PR, However there is already a PR #22170 addressing this feature.