Cleanup fails when bind files are no longer available

[jbemmel]

During sudo clab destroy --cleanup -t lab.yml:

Error: failed to verify bind path: stat /home/jeroen/Projects/netlab/tests/clab_files/xr/daemons: no such file or directory

Such errors aren't critical when doing 'destroy', and shouldn't stop the process

[hyposcaler-bot]

Looked at this to just understand the flow for destroy.

a side effect of cmd.destroyFn() calling clab.NewContainerLab() to parse the topology is that clab.resolveBindPaths() eventually gets called.

clab.resolveBindPaths() kicks the error if os.stat() errors on the path.