Convert `sentry.gradle` to Kotlin and add Matrix testing (AGP vs Gradle vs RN)

[marandaneto]

https://github.com/getsentry/sentry-react-native/blob/main/sentry.gradle
Similar to https://github.com/getsentry/sentry-android-gradle-plugin/blob/main/.github/workflows/test-publish-dry-run.yaml

[krystofwoldrich]

Example of what could we test and avoid if using Kotlin
https://github.com/getsentry/sentry-react-native/pull/2657/files#diff-01c94c11105e37de1b11a82973b605f625fff5959b0386c32fd1e42a14325208R206-R208