Ensure Sentry is able to initialize without DSN if Spotlight is enabled

[buenaflor]

As part of the requirement to make Spotlight compatible with SDKs, the SDKs should be able to initialize without a DSN if Spotlight is enabled

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1. Ensure Sentry is able to initialize without DSN if Spotlight is enabled sentry-cocoa#4620
   Platform: Cocoa +1
2. Ensure Sentry is able to initialize without DSN if Spotlight is enabled sentry-java#3981
   Platform: Android Platform: Java +2
3. Use spotlight without supplying a DSN sentry-dart#2213
   0 of 2
   Platform: Dart enhancement +2
4. Ensure Sentry is able to initialize without DSN if Spotlight is enabled sentry-react-native#4372
   0 of 3
   Platform: React-Native +1
   
5. KMP depends on native sdks