Minidump attached to envelope results in cleared `exceptions`

[timfish]

If a minidump is attached to an event, any existing exceptions are removed:

relay/relay-server/src/utils/native.rs

Line 68 in 6c8f3be

exceptions.clear(); // clear previous errors if any

This is an issue for a new feature in the Electron SDK:
getsentry/sentry-electron#1382

Essentially, Electron now includes JavaScript stack traces in the crashpad annotations for renderer OOM crashes. The Electron SDK parses these out of the minidump and includes them in the exceptions of the event.

Currently the JavaScript stack trace is lost:
https://sentry-sdks.sentry.io/issues/7524402832/?project=5650507