Add ASR CTC streaming example (#15309)
* Single-epoch run
* Apply suggestions from code review
Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>
* Infinite dataset
* Trainer fix + distributed benchmark
* Benchmark fix
* unused import
* interleaved splits
* interleaved splits
* has_length util
* Move to research projects
* Leftover Sized checks
* Bump min version
* Unused import
* Revert trainer changes
Co-authored-by: Patrick von Platen <patrick.v.platen@gmail.com>