Allow to report minidump event as non-crash (handled:true)

[trzeciak]

The minidump mechanism can be created not only crash occurs, but also when triggered manually.

It is useful to record additional/intentional minidump (with stack traces) during debugging unexpected lags in native application.
In this case, it should be expected that the event in the sentry will not be marked as 💀 Unhandled.
This unhandled events generated false positive alarm.

I suggest to read the handled flag from the event if present [LINK].

Thanks supervacuus for explaining what the flow looks like!

Related issue/pull-request:

• https://github.com/getsentry/sentry-native/issues/823
• https://github.com/getsentry/sentry-native/issues/268
• https://github.com/getsentry/relay/pull/598

Unfortunately, I am not skilled to propose a pull-request.

[iker-barriocanal]

@getsentry/owners-native I believe this is your domain, could you triage it?