fix: add binaryarch to all events

[kattrali]

Goal

Ensure the app.binaryArch field is set for every event. The field would only be set for particular NDK events but is generally useful everywhere for debugging.

PLAT-6813

Design

The NDK plugin sets the binary arch property of the app data collector upon successful initialization of the native components. This way it should be present for all events.

Changeset

• Added a new JNI function, NdkPlugin.getBinaryArch(), which returns the arch or unknown as a String.
• Removed now-unused functions for computing the binary arch, instead loading it from event data

Testing

• Tested manually to verify the correct archs are sent, in addition to updating the smoke tests to expect the field

[lemnik]

LGTM

[fractalwrench]

LGTM pending resolution of comments