Introduce fatal SDK logger

[adinauer]

📜 Description

Add fatalLogger to SentryOptions which defaults to using AndroidFatalLogger for Android and SystemOutLogger otherwise.

💡 Motivation and Context

When mixed versions are detected with debug set to false, no log messages about exact dependencies and versions would be visible. Instead of asking customers to restart with debug set to true, we now have a fatal logger that will always print its messages regardless of debug or diagnosticLevel.

💚 How did you test it?

📝 Checklist

• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

[github-actions]

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📖	Do not forget to update Sentry-docs with your feature once the pull request gets approved.

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