Use Sentry logs to log stacktrace for Debug/Dev builds

[mujacica]

With 7aa553c we removed an option to print the stacktrace during OnCrash handling since that was causing secondary Sentry crashes whenever there was any kind of memory-allocator/stack corruption happening.

Having this feature re-integrated, now with Sentry logs - and on all platforms, would be helpful for Debug/Development builds (that don't have symbols uploaded).

We should:

• Add an option to enable OnCrash logging (with note about not-prod safety)
• Try to cover all platforms (not only Windows)

[linear]

UNREAL-109

[tustanivsky]

While stack trace logging was re-integrated for Windows and Xbox in #1170 and #1177 these messages are currently not forwarded to Sentry logs because in sentry-native they are flushed before the on_crash callback is invoked.