fix: update from upstream

See https://github.com/nrfconnect/sdk-nrf/tree/dde78793478089ef8cce1bcc99b0baa95a94eb83/applications/asset_tracker_v2

Author: GitHub Actions

overlay-carrier.conf

@@ -22,10 +22,6 @@ CONFIG_PDN_CONTEXTS_MAX=3
 # AT Monitor is used by PDN library
 CONFIG_AT_MONITOR=y
 
-# Increase AT Command driver buffers to handle expected commands
-CONFIG_AT_CMD_THREAD_STACK_SIZE=1536
-CONFIG_AT_CMD_RESPONSE_MAX_LEN=2600
-
 # Download client for DFU
 CONFIG_DOWNLOAD_CLIENT_MAX_FILENAME_SIZE=230
 

src/cloud/azure_iot_hub_integration.c

@@ -275,7 +275,7 @@ int cloud_wrap_init(cloud_wrap_evt_handler_t event_handler)
 	int err;
 
 #if !defined(CONFIG_CLOUD_CLIENT_ID_USE_CUSTOM)
-	char imei_buf[20];
+	char imei_buf[20 + sizeof("OK\r\n")];
 
 	/* Retrieve device IMEI from modem. */
 	err = nrf_modem_at_cmd(imei_buf, sizeof(imei_buf), "AT+CGSN");