fix(NcAppSidebar): restore attrs and classes inheritance

[ShGKme]

☑️ Resolves

Makes <NcAppSIdebar> with Fragment work like there is no Fragment

• Regression from: feat(NcAppSidebar): Allow to set open state to prevent focus trap issues on mobile #5584
• Has alternative: fix(NcAppSidebar): make sidebar a single node again to allow v-show, classes and attributes #5627
• <Fragment> breaks:
  • Passing attributes and classes, because in Vue 2 they are not a part of $attrs and even cannot be defined as $props
  • scoped styles from parent's data-v-{scopeid} on the root element
  • using v-show but it is not fixed in this PR
• <Transition> does not pass attributes with disabled inheritance (no idea why, but in vue 2 this component was not so pure)

This PR restores it in quite a dirty way. I don't see any better solution without a breaking change.

Example of broken apps - Files:

• No cy-data-sidebar attributes for e2e
• No app-sidebar--full class
• No data-v-{scopeId} attr required for app-sidebar--full

🖼️ Screenshots

🏚️ Before	🏡 After

🚧 Tasks

• Pass attrs and listeners on <aside> directly
• Manually take and bind classes and styles from VNode
• Manually set data-v-{scopeid} from $parent

🏁 Checklist

• ⛑️ Tests are included or are not applicable
• 📘 Component documentation has been extended, updated or is not applicable
• 3️⃣ Backport to next requested with a Vue 3 upgrade

[susnux]

This one is quite nice, small and works 👍

[ShGKme]

Closing in flavor of #5627