DRY notifications stack storyboard and initial VC access

[mokagio]

Follow us on the change in #24463 that fixed the notifications Storyboard access from the Reader app.

Part of https://linear.app/a8c/issue/CMM-260/configure-reader-target

[kean]

Rebasing and merging 🙇

[dangermattic]

	1 Warning
⚠️	This PR is assigned to the milestone 25.9. The due date for this milestone has already passed. Please assign it to a milestone with a later deadline or check whether the release for this milestone has already been finished.

Generated by 🚫 Danger

[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

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress by scanning the QR code below to install the corresponding build.

	App Name	WordPress
	Configuration	Release-Alpha
	Build Number	27377
	Version	PR #24464
	Bundle ID	org.wordpress.alpha
	Commit	0f2e1dc
	Installation URL	4b9i0jhvivqoo

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack by scanning the QR code below to install the corresponding build.

	App Name	Jetpack
	Configuration	Release-Alpha
	Build Number	27377
	Version	PR #24464
	Bundle ID	com.jetpack.alpha
	Commit	0f2e1dc
	Installation URL	50r5ilo7acsm0

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.