Introduce dist.remote_execute_func op and a pass that converts it to dist.remote_exec
Introduce dist.remote_execute_func op and a pass that converts it to dist.remote_exec

This operation calls a TFRT function defined in the current file.
The transformation will serialize it to an attribute attached to
dist.remote_register and replace the call with dist.remote_exec

PiperOrigin-RevId: 334088559

tensorflow/runtime,tensorflow/runtime,tensorflow/runtime,tensorflow/runtime