[chassis]: removed dependency for bgp and swss for chassis supervisor (#15734)

Fixes #15667 and #13293

Work item tracking
Microsoft ADO 24472854:

How I did it
On chassis supervisor bgp feature is disabled in hostcfgd. The dependency between swss and bgp causes the bgp containers to start even though the feature is disabled.

How to verify it
Tests on chassis supervisor and LC

Author: arlakshm

files/scripts/swss.sh

@@ -318,6 +318,16 @@ function check_macsec()
     fi
 }
 
+function check_add_bgp_dependency()
+{
+    if ! is_chassis_supervisor; then
+        if [ "$DEV" ]; then
+            DEPENDENT="${DEPENDENT} bgp@${DEV}"
+        else
+            DEPENDENT="${DEPENDENT} bgp"
+        fi
+    fi
+}
 function check_ports_present()
 {
     PORT_CONFIG_INI=/usr/share/sonic/device/$PLATFORM/$HWSKU/$DEV/port_config.ini
@@ -353,19 +363,17 @@ fi
 if [ "$DEV" ]; then
     NET_NS="$NAMESPACE_PREFIX$DEV" #name of the network namespace
     SONIC_DB_CLI="sonic-db-cli -n $NET_NS"
-    DEPENDENT+=" bgp@${DEV}"
 else
     NET_NS=""
     SONIC_DB_CLI="sonic-db-cli"
-    DEPENDENT+=" bgp"
 fi
 
 PLATFORM=`$SONIC_DB_CLI CONFIG_DB hget 'DEVICE_METADATA|localhost' platform`
 HWSKU=`$SONIC_DB_CLI CONFIG_DB hget 'DEVICE_METADATA|localhost' hwsku`
 
 check_peer_gbsyncd
 check_macsec
-
+check_add_bgp_dependency
 check_ports_present
 PORTS_PRESENT=$?