asterisk: 24.0.0-rc2 image built from source with static config

Adds stub configs and noloads so a clean boot logs no ERROR lines,
ships stock indications.conf, seeds default MOH from the entrypoint.
Spec 01 synced with the real files.

Task: M0-T5

asterisk/conf/rtp.conf

@@ -0,0 +1,4 @@
+[general]
+rtpstart = 10000
+rtpend = 20000
+#include selfphoneng/rtp_selfphoneng.conf