Mirko Bonadei 9130431b54 Add possibility to set RTC_OBJC_TYPE_PREFIX from GN.
This CL also adds the prefix RTC_TESTING to `ios_internal_pure_release_bot_arm64` in order to avoid ODR
violations.

Bug: b/292472934
Change-Id: If63020e679c8670b4c797217eb38fc8c2954d422
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/313240
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40476}
2023-07-26 12:29:55 +00:00
..
2023-06-30 12:34:51 +00:00