Reland "ice server parsing: return RTCError with more details"

This is a reland of commit c4b0bde7f2daabc4e0667fb73d096d1cf0819226
which changes the name of the new method and adds a deprecated
backward compatible variant with the old name.

Original change's description:
> ice server parsing: return RTCError with more details
>
> surfacing those errors to the API (without specific details) instead of just the logging.
>
> BUG=webrtc:14539
>
> Change-Id: Id907ebeb08b96b0e4225a016a37a12d58889091b
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/278340
> Reviewed-by: Henrik Boström <hbos@webrtc.org>
> Reviewed-by: Harald Alvestrand <hta@webrtc.org>
> Commit-Queue: Philipp Hancke <phancke@microsoft.com>
> Cr-Commit-Position: refs/heads/main@{#38356}

Bug: webrtc:14539
Change-Id: I0a5482e123f25867582d62101b31ed207b95ea1a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/278962
Commit-Queue: Philipp Hancke <phancke@microsoft.com>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38364}
diff --git a/pc/ice_server_parsing.h b/pc/ice_server_parsing.h
index da5de10..549964e 100644
--- a/pc/ice_server_parsing.h
+++ b/pc/ice_server_parsing.h
@@ -27,7 +27,12 @@
 //
 // Intended to be used to convert/validate the servers passed into a
 // PeerConnection through RTCConfiguration.
-RTC_EXPORT RTCErrorType
+RTC_EXPORT RTCError
+ParseIceServersOrError(const PeerConnectionInterface::IceServers& servers,
+                       cricket::ServerAddresses* stun_servers,
+                       std::vector<cricket::RelayServerConfig>* turn_servers);
+
+[[deprecated("use ParseIceServersOrError")]] RTC_EXPORT RTCErrorType
 ParseIceServers(const PeerConnectionInterface::IceServers& servers,
                 cricket::ServerAddresses* stun_servers,
                 std::vector<cricket::RelayServerConfig>* turn_servers);