Add preflight check for apps-crc.testing DNS resolution

[cfergeau]

I recently helped someone debug their crc install. The issue was a /etc/NetworkManager/dnsmasq.d/openshift.conf file taking precedence over the crc.conf file that crc installs. This was causing *..apps-crc.testing to resolve to 192.168.126.11 instead of the expected 192.168.130.11. We should have a check resolving foo.apps-crc.testing and erroring out if it does not resolve to 192.168.130.11. I'm not sure we can automatically fix this though.

[cfergeau]

This might become obsolete with #248

[gbraad]

We still have to check for the existence of the file during the setup command to clean the state... and this can be a general command to make sure we are in a consistent state.

the deletion of this file might be included for a short time

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[cfergeau]

This was addressed in 6673ade except on macos. See also #1013