feat: Made native samples be platform sensitive (#551)

* split native buttons per platform

* updated CHANGELOG.md

* new package snapshot

Author: bitsandfoxes

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Features
 
+- Updated native samples to only display buttons for the currently active platform ([#551](https://github.com/getsentry/sentry-unity/pull/551))
 - Unity logged exceptions are marked as unhandled by default ([#542](https://github.com/getsentry/sentry-unity/pull/542))
 
 ### Fixes