Migrate standalone tools and loopback tests to LoggingConfig

Update standalone command-line tools, loopback test runners, and fuzzer
defaults to initialize logging via webrtc::InitializeLogging instead of
legacy LogMessage::LogToDebug and SetLogToStderr:
- video_loopback
- sv_loopback
- screenshare_loopback
- rtc_event_log_visualizer
- rtc_event_log_to_text
- video_encoder
- data_channel_benchmark
- audio_processing_simulator
- rnn_vad_tool
- webrtc_fuzzer_main

Bug: webrtc:42234107
Change-Id: I52a531176a5d2ba09c460a9afecb55c05085b4ee
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/500741
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Commit-Queue: Fredrik Solenberg <solenberg@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#48526}