Add benchmarks to measure Stream Encoder

### Is your feature request related to a problem or challenge?

follow up for #10277



### Describe the solution you'd like

https://github.com/apache/arrow-rs/pull/10277/changes#r3608691270

### Describe alternatives you've considered

n/a

### Additional context

it would be nice to have benchmarks to guage improvments for changes made to the stream encoder over time