[202405][test_wr_arp] Warm reboot is failing during execution of testWrArpAdvance due to docker exec failure

[gpunathilell]

Description

During testWrArpAdvance in sonic-mgmt https://github.com/sonic-net/sonic-mgmt/blob/040d677e9355aa62c7a7ad1e05fc587a22641fa0/tests/arp/test_wr_arp.py#L90 the warm-reboot execution fails due to failed docker exec during the check_docker_exec function during the warm-reboot execution https://github.com/sonic-net/sonic-utilities/blob/2f8508f182566dd75a7c66cfd8dcccaa21470485/scripts/fast-reboot#L469. The docker exec call times out and due to which the warm-reboot execution fails, causing test failure.
Issue is currently observed only in 202405 and with a rare occurence ( 1 in 20 runs)
Log Errors:

2024 Dec  2 01:36:01.052167 sonic NOTICE root: Starting warm-reboot
2024 Dec  2 01:36:15.415931 sonic INFO dockerd[1063]: time="2024-12-02T01:36:15.414956087+02:00" level=error msg="Error running exec 5da6854722ff10dd3ce552ff9baba424ac1d6e7a245ca45ebdedc7bbe0521527 in container: exec attach failed: error attaching stdout stream: write unix /var/run/docker.sock->@: write: broken pipe" 
2024 Dec  2 01:36:15.481252 sonic ERR root: Error seen during warm-reboot shutdown process: Docker exec on lldp timedout
2024 Dec  2 01:36:22.245221 sonic NOTICE root: Cancel warm-reboot: code (0)

Only reproduced once in 20 runs, and the docker for which the docker exec fails is different in each case

Steps to reproduce the issue:

1. Run testWrArpAdvance test