Showkase ignoring the Locale parameter for @Preview

[barry-irvine]

We just migrated to ksp so we're getting snapshots for the normal previews too but one of our date components has different behaviour dependent on the Locale. (Start day of week is Sunday for en-rUS and Monday for en-rGB).

While this works correctly when viewing the @Preview in Android Studio it is completely ignored when generating the snapshots (which just uses the Locale of the device that generates them).