GTI Hack: remove to monitoring optic sensor with thor nic

Summary:
# Description
Thor2 uses a QSFP connector instead of an OSFP connector and does not have optical sensors.

The mapping table for the result of  "kv get swb_nic_source": 0: CX7
1: IB CX7
2: Thor2

X-link: facebookexternal/openbmc.quanta#4426

Test Plan:
Build and test pass with GTI MI300 system and thor2 NIC

root@bmc-oob:~# kv get swb_nic_source
2

root@bmc-oob:~# fw-util swb --version swb_nic0
SWB_NIC0 Version: 230.2.53.0

root@bmc-oob:~# sensor-util swb
swb:
SWB_NIC0_TEMP_C              (0x1) :  51.000 C     | (ok)
SWB_NIC0_VOLT_V              (0x2) :  12.120 Volts | (ok)
SWB_NIC0_CURR_A              (0x3) :   1.123 Amps  | (ok)
SWB_NIC0_PWR_W               (0x4) :  13.574 Watts | (ok)

Reviewed By: wangx6f

Differential Revision: D62035071

fbshipit-source-id: a628fa322fbaf1ef7e03a93e646e699d4bb13ee0

meta-facebook/meta-grandteton/recipes-grandteton/plat-utils/files/setup-common-dev.sh

@@ -236,6 +236,8 @@ if [ $mb_product != "GTA" ]; then
         val=$((16#${array[3]}))
         if [ "$val" -eq 1 ]; then
           kv set swb_nic_source "$SWB_1ST_SOURCE"
+        elif [ "$val" -eq 0 ] && [ "$mb_product" == "GTI" ]; then
+          kv set swb_nic_source "$SWB_3RD_SOURCE"
         else
           kv set swb_nic_source "$SWB_2ND_SOURCE"
           #Support Fan table config3