CI/CD: verify_and_release: Run Coinboot server and boot workers shows error on dnsmasq start

[frzb]

Despite the error message the CI/CD pipeline suceeds.

We have to identify if this is a real problem our just a side effect of installing dnsmasq for running a preflight check with dnsmasq aginst our dnsmasq configuration file.

https://github.com/frzb/coinboot/runs/4657577120?check_suite_focus=true#step:5:375

[snip]
Job for dnsmasq.service failed because the control process exited with error code.
See "systemctl status dnsmasq.service" and "journalctl -xe" for details.
invoke-rc.d: initscript dnsmasq, action "start" failed.
● dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server
     Loaded: loaded (]8;;file://fv-az246-793/lib/systemd/system/dnsmasq.service/lib/systemd/system/dnsmasq.service]8;;; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Wed 2021-12-29 10:07:33 UTC; 6ms ago
    Process: 2975 ExecStartPre=/usr/sbin/dnsmasq --test (code=exited, status=0/SUCCESS)
    Process: 2976 ExecStart=/etc/init.d/dnsmasq systemd-exec (code=exited, status=2)

Dec 29 10:07:33 fv-az246-793 systemd[1]: Starting dnsmasq - A lightweight DHCP and caching DNS server...
Dec 29 10:07:33 fv-az246-793 dnsmasq[2975]: dnsmasq: syntax check OK.
Dec 29 10:07:33 fv-az246-793 dnsmasq[2976]: dnsmasq: failed to create listening socket for port 53: Address already in use
Dec 29 10:07:33 fv-az246-793 systemd[1]: dnsmasq.service: Control process exited, code=exited, status=2/INVALIDARGUMENT
Dec 29 10:07:33 fv-az246-793 dnsmasq[2976]: failed to create listening socket for port 53: Address already in use
Dec 29 10:07:33 fv-az246-793 systemd[1]: dnsmasq.service: Failed with result 'exit-code'.
Dec 29 10:07:33 fv-az246-793 dnsmasq[2976]: FAILED to start up
Dec 29 10:07:33 fv-az246-793 systemd[1]: Failed to start dnsmasq - A lightweight DHCP and caching DNS server.
[snap]