Integrate gutenberg-mobile release 1.73.1

[SiobhyB]

Description

This PR incorporates the 1.73.1 release of gutenberg-mobile.
For more information about this release and testing instructions, please see the related Gutenberg-Mobile PR: wordpress-mobile/gutenberg-mobile#4739

Release Submission Checklist

• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

[peril-wordpress-mobile]

	Warnings
⚠️	PR is not assigned to a milestone.

Generated by 🚫 dangerJS

[wpmobilebot]

You can test the changes in Jetpack from this Pull Request by:

• Clicking here or scanning the QR code below
• Then installing the build number pr18306-4a2edd4 from App Center on your iPhone

The .ipa file can also be downloaded directly here.
If you need access to App Center, please ask a maintainer to add you.

[wpmobilebot]

You can test the changes in WordPress from this Pull Request by:

• Clicking here or scanning the QR code below
• Then installing the build number pr18306-4a2edd4 from App Center on your iPhone

The .ipa file can also be downloaded directly here.
If you need access to App Center, please ask a maintainer to add you.

[mokagio]

@SiobhyB this has been bundled as part of 19.6 beta 2 (19.6.0.2).

Thanks for your work 🙌