asterisk: Wait for dnsmasq resolver ready before starting Asterisk
Otherwise Asterisk wil lfaill to add the identify match at startup:
[2024-07-11 10:35:02.199] ERROR[14]: netsock2.c:303 ast_sockaddr_resolve: getaddrinfo("ims.mnc001.mcc238.3gppnetwork.org", "(null)", ...): Temporary failure in name resolution [2024-07-11 10:35:02.199] ERROR[14]: res_pjsip_endpoint_identifier_ip.c:553 ip_identify_apply: Identify 'volte_ims' failed when adding resolution results of 'ims.mnc001.mcc238.3gppnetwork.org' [2024-07-11 10:35:02.199] ERROR[14]: res_sorcery_config.c:422 sorcery_config_internal_load: Could not create an object of type 'identify' with id 'volte_ims' from configuration file 'pjsip.conf'
