revert: fix: prevent main app from blocking notification extension (take 2) - WPB-23511 🍒

[github-actions]

This PR was automatically cherry-picked based on the following PR:

• revert: fix: prevent main app from blocking notification extension (take 2) - WPB-23511 #4735

Original PR description:

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WPB-23511 [iOS] NSE is often getting stuck and expiring

This reverts commit 425860d.

Issue

Builds with this #4689 exhibit the bug, so reverting it and will try again.

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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.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[johnxnguyen]

Closing because the revert was only for 4.19 and another fix has been applied on develop for 4.20