Move call/simulated_network to test/network

Old target and call/simulated.h exist but refer to new target in test/network.

Bug: webrtc:14525
Change-Id: Ida04cef17913f2f829d7e925ae454dc40d5e8240
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/349264
Commit-Queue: Per Kjellander <perkj@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Owners-Override: Per Kjellander <perkj@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#42191}
diff --git a/api/BUILD.gn b/api/BUILD.gn
index 152f2cb..3a99738 100644
--- a/api/BUILD.gn
+++ b/api/BUILD.gn
@@ -865,7 +865,7 @@
     ":peer_network_dependencies",
     ":simulated_network_api",
     ":time_controller",
-    "../call:simulated_network",
+    "..//test/network:simulated_network",
     "../rtc_base:checks",
     "../rtc_base:network",
     "../rtc_base:network_constants",