Use real rather than simulated task queues in rtp replayer fuzzers

Simulated task queues do not cooperate with Event class implemented by
chromium and thus lead to deadlock when Event is used for a blocking
call on the simulated task queue.

This is partial revert of
https://webrtc-review.googlesource.com/c/src/+/470500

Bug: chromium:510952673
Change-Id: Id636531090850442cbc13410b969b6960fce8e9b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/471000
Auto-Submit: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#47701}