fix: waiting for quicksync to finish to send message - WPB-15405

[netbe]

WPB-15405 [iOS] Guest User on Wire Cloud could not join ongoing call

Issue

Currently when sending a message for avs (or any message), the MessageSender waits for the quickSync to be finished. When a user has a lot of events to sync it could cause a a delay messing up with calling.

Solution:

Wait only for decryption to be finished during the quickSync.

Testing

WIP

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Checklist

• Title contains a reference JIRA issue number like [WPB-XXX].
• Description is filled and free of optional paragraphs.
• Adds/updates automated tests.

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UI accessibility checklist

If your PR includes UI changes, please utilize this checklist:

• Make sure you use the API for UI elements that support large fonts.
• All colors are taken from WireDesign.ColorTheme or constructed using WireDesign.BaseColorPalette.
• New UI elements have Accessibility strings for VoiceOver.