Use webrtc name specifier instead of rtc/cricket in test

WebRTC has unified all namespaces to webrtc, and the rtc:: and cricket::
name specifiers need to be replaced with webrtc::. This was generated using
a combination of clang AST rewriting tools and sed.

This CL was uploaded by git cl split.

Bug: webrtc:42232595
Change-Id: Ice34d1b22621a13023cdf1ffe7e3af9f1cb194a8
No-Iwyu: LSC
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/386622
Auto-Submit: Evan Shrubsole <eshr@webrtc.org>
Reviewed-by: Jeremy Leconte <jleconte@webrtc.org>
Commit-Queue: Jeremy Leconte <jleconte@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#44408}