Feat request: Output device logs into results dir

[dginovker]

Author the user story for this feature

As a user running Flank in CICD, I want to capture the device logs that happened while I ran a robo test so I can parse them and make sure certain logs appeared.

Specifically, I'm testing Unity apps which don't support a lot of the built-in automation test tooling, but with the logs I can at least make sure a certain scene gets reached.

Describe the solution

Output logs in results/YYYY-MM-DD_XX-YY-ZZ.ABCDEF/logs/{text_axis_value}.txt so it can be grep'ed

Describe alternatives considered

Looking into where the logs are saved on Google Cloud and downloading them myself

[dginovker]

flank:
  files-to-download: 
    - logcat

Does exactly what's being requested