support of OnlyTestIdentifiers

[omnarayan]

Is your feature request related to a problem? Please describe. We want to run a single or set of test cases, in xcodebuild, we have support this feature. Normally to run one test, we have to run all test cases in go-ios, this is take lots of time.

We have option in https://github.com/danielpaulus/go-ios/blob/37c40b3d1abc7a0613af0a289606abddceb82f43/ios/nskeyedarchiver/objectivec_classes.go#L95

Describe the solution you'd like in runtest option, we should start getting single or list of test cases as input to run

Describe alternatives you've considered or start supporint a json/yaml bases run config where user can give these options

Additional context Add any other context or screenshots about the feature request here. https://github.com/appium/appium-ios-device claim to claim to support it, I have not tested it yet.