[cmake] add option for `OPENTHREAD_CONFIG_NET_DIAG_VENDOR_INFO_SET_AP…

…I_ENABLE`

This makes it easier to configure this option for testing on OTBR/RCP.

etc/cmake/options.cmake

@@ -229,6 +229,7 @@ ot_option(OT_NAT64_TRANSLATOR OPENTHREAD_CONFIG_NAT64_TRANSLATOR_ENABLE "NAT64 t
 ot_option(OT_NEIGHBOR_DISCOVERY_AGENT OPENTHREAD_CONFIG_NEIGHBOR_DISCOVERY_AGENT_ENABLE "neighbor discovery agent")
 ot_option(OT_NETDATA_PUBLISHER OPENTHREAD_CONFIG_NETDATA_PUBLISHER_ENABLE "Network Data publisher")
 ot_option(OT_NETDIAG_CLIENT OPENTHREAD_CONFIG_TMF_NETDIAG_CLIENT_ENABLE "Network Diagnostic client")
+ot_option(OT_NETDIAG_VENDOR_INFO OPENTHREAD_CONFIG_NET_DIAG_VENDOR_INFO_SET_API_ENABLE "Allow setting vendor info at runtime")
 ot_option(OT_OPERATIONAL_DATASET_AUTO_INIT OPENTHREAD_CONFIG_OPERATIONAL_DATASET_AUTO_INIT "operational dataset auto init")
 ot_option(OT_OTNS OPENTHREAD_CONFIG_OTNS_ENABLE "OTNS")
 ot_option(OT_PING_SENDER OPENTHREAD_CONFIG_PING_SENDER_ENABLE "ping sender" ${OT_APP_CLI})