Draft: Fix parallel run

[jkuchar]

Description

Fix, so this tool can be used when run UI tests in parallel.

Detailed Design

There need to provide parameter for binary OR configuration if in SwiftClient OR detecting evenironment and passing the information over the HTTP parameter.

Documentation

Once there will be decision, how the parameter will be passed, documentation will need to updated

Testing

N/A, just draft for now

Performance

No impact.

Source Impact

The current draft break support for sequential run. If passed as parameter, there will be no BC break.

Checklist

• I've read the Contribution Guidelines
• I've followed the coding style of the rest of the project.
• I've added tests covering all new code paths my change adds to the project (to the extent possible).
• I've added benchmarks covering new functionality (if appropriate).
• I've verified that my change does not break any existing tests or introduce unexpected benchmark regressions.
• I've updated the documentation (if appropriate).

Result

[jkuchar]

I have rebuild binary, so I can use my fork and use in the CI.

[jkuchar]

Concept of sets is described on stackoverflow: https://stackoverflow.com/a/58293549/631369

• default set is path ~/Library/Developer/CoreSimulator/Devices source
• "testing" is ~/Library/Developer/XCTestDevices source, which is used by parallel UI test runner
• previews set, that is used by Xcode for rendering previews. source.