Set reasonable duration or create new exception for `dragUntilExists` and `dragUntilVisible`

[fylyppo]

There are TODOs left in the code: https://github.com/leancodepl/patrol/blob/da6404a3006920e1c876ecf9376dfdcc64d97d7c/packages/patrol_finders/lib/src/custom_finders/patrol_tester.dart#L485 and https://github.com/leancodepl/patrol/blob/da6404a3006920e1c876ecf9376dfdcc64d97d7c/packages/patrol_finders/lib/src/custom_finders/patrol_tester.dart#L558