SteamOS + Compatibility Layer Support

[mujacica]

Support running Sentry on SteamOS through compatibility layer (e.g. Proton).

Right now non-fatal errors are being successfully caught and sent to sentry however crashes are not coming through.

Initial assumption is that due the compatibility layer in between the game and crash handlers (crashpad, breakpad etc.), those are not able to either start or catch the crashes.

Tested on SteamOS + Proton 9.0.4 + Unreal Demo (Sentry Tower)

Tested/Implemented Features

• Non-fatal events
• Attachments (e.g. log file)
• Structured Logs
• Fatal events (Crashes)
• Screenshots support
• Minidump support
• Extended metadata (e.g. OS currently reported as Windows, no compatibility layer detection)

[linear]

UNREAL-100