Add psana2 streaming mode
This brings in psana2 streaming mode. Minor changes include switching all main tests to use 3IYF dataset with fsc convergence check. Optional reviewers: @eslaught @yoon82 @jpblaschke
This brings in psana2 streaming mode. Minor changes include switching all main tests to use 3IYF dataset with fsc convergence check. Optional reviewers: @eslaught @yoon82 @jpblaschke