[Ruby] Improve non-blocking I/O for Flight client?

### Describe the enhancement requested

I'm trying to do multiple Flight DoGet requests in parallel Ruby Threads/Fibers and observe that `ArrowFlight::Client#do_get` doesn't yield to another Thread/Fiber until the first Arrow Record (RecordBatch) is received.

Is it possible to yield more frequently, such as:
* Right after sending the request ticket?
* After each chunk in the Record (RecordBatch)?

### Component(s)

Ruby