fix: crash when application launched from UNUserNotificationCenter notification

[miniak]

Description of Change

We have a custom node module, which is using the new UNUserNotificationCenter APIs to show notifications. When the application is launched from such notification, the NSApplicationLaunchUserNotificationKey points to a UNNotificationResponse instance instead of NSNotification. This leads to an unrecognized selector exception. Check for NSNotification before accessing the userInfo property.

We can also use the NSApplicationLaunchUserNotificationKey directly, as it was introduced in macOS 10.8
Checking userInfo for nil is not necessary, as it's done by NSDictionaryToDictionaryValue.

Checklist

• PR description included and stakeholders cc'd
• npm test passes
• tests are changed or added
• PR title follows semantic commit guidelines
• PR release notes describe the change in a way relevant to app developers, and are capitalized, punctuated, and past tense.

Release Notes

Notes: Fixed crash when application launched from UNUserNotificationCenter notification (via a native node module).

[release-clerk]

Release Notes Persisted

Fixed crash when application launched from UNUserNotificationCenter notification (via a native node module).

[trop]

I have automatically backported this PR to "10-x-y", please check out #25737

[trop]

I have automatically backported this PR to "11-x-y", please check out #25738

[trop]

I have automatically backported this PR to "9-x-y", please check out #25739