[interfaces-config] "main exception: cannot find interfaces: eth0" error log avoided (#10463)

- Why I did it
Fixes #9628
During bootup, this error log is seen

Dec 22 04:26:29 sonic interfaces-config.sh[2546]: error: main exception: cannot find interfaces: eth0 (interface was probably never up ?)
This is of non-functional nature and doesn't affect the flow.

- How I did it
Dont take the ifdown if not needed

- How to verify it
Verified during reboot. Log did not appear and IP was acquired on eth0 as expected

Signed-off-by: Vivek Reddy Karri <[email protected]>

Author: vivekrnv

files/image_config/interfaces/interfaces-config.sh

@@ -1,6 +1,8 @@
 #!/bin/bash
 
-ifdown --force eth0
+if [[ $(ifquery --running eth0) ]]; then
+    ifdown --force eth0
+fi
 
 # Check if ZTP DHCP policy has been installed
 if [ -e /etc/network/ifupdown2/policy.d/ztp_dhcp.json ]; then