Use Appium to get iOS E2E logs

[nickdowell]

Goal

Make it easier to investigate test failures by including device syslog in maze_output.

Changeset

Uses Appium's get_log method to fetch the device log for each scenario.

@twometresteve once proven, this probably should find its way into maze-runner.
On Android, I think get_log('logcat') should work.

Testing

Verified logs are populated when running locally.

[github-actions]

Bugsnag.framework binary size did not change - 757,680 bytes

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  [ = ]       0  [ = ]       0    TOTAL

Generated by 🚫 Danger

[twometresteve]

Were you expecting at least one of the pipeline steps to upload files as buildkite artifacts?

[nickdowell]

Were you expecting at least one of the pipeline steps to upload files as buildkite artifacts?

Only failed scenarios have their logs uploaded, so I wasn't expecting to see any in a successful build.

[twometresteve]

Nice