fix(MessagesList) - don't add parent messages to the messages list

[Antreesy]

☑️ Resolves

• Fix User's and system messages with parent add them as a separate messages out of context #10007
• User replies:
  • don't add parent messages to the list
  • contain parent message inside, how it naturally comes from server, and use it for <Quote/> component
  • navigate to parent message on click on <Quote/> (fetch if needed, and highlight)
• System messages message_deleted:
  • don't add parent messages to the list
  • are no longer appear in messages store/list
  • update parent message only if it's in the store/list already
• System messages reaction and reaction_<...>:
  • update parent message only if it's in the store/list already
• Minor optimisations of processMessage action and unit tests

🖼️ Screenshots

Fetch limit set to 3. Last 3 messages are:

• User's reply (to test message 1)
• System 'message_deleted' (to test message 2)
• System 'reaction' (to test message 3)

🏚️ Before	🏡 After

🚧 Tasks

• Replies
  • Works for messages, temporary messages, NewMessage form
• Deleted messages
• Reactions
• Code review
• Test different usecases

🏁 Checklist

• ⛑️ Tests (unit and/or integration) are included or not required
• 📘 API documentation in docs/ has been updated or is not required
• 📗 User documentation in https://github.com/nextcloud/documentation/tree/master/user_manual/talk has been updated or is not required
• 🔖 Capability is added or not needed

[Antreesy]

/backport to stable27