SDK Crash Detection: Support Multiple Exceptions

The SDK crash detection only detects crashes based on the last exception and doesn't support detecting SDK crashes when there are multiple ones; see

https://github.com/getsentry/sentry/blob/1ca224f599a99b905ddaea982d61b1fb26124863/src/sentry/utils/sdk_crashes/sdk_crash_detector.py#L52-L69

When tackling this issue, we must adopt the event stripper to support stripping data from multiple exceptions.
https://github.com/getsentry/sentry/blob/1ca224f599a99b905ddaea982d61b1fb26124863/src/sentry/utils/sdk_crashes/event_stripper.py#L126-L142

Start with src/sentry/utils/sdk_crashes/sdk_crash_detector.py at lines 52-69 to understand how detection currently uses the last exception. Then read src/sentry/utils/sdk_crashes/event_stripper.py at lines 126-142 and adapt the investigation around stripping data from multiple exceptions; done means SDK crashes are detected when multiple exceptions are present.

Written by the indexing model from the issue text.