fix: do not fail if missing permissions

[carlossg]

to some CRDs

Continue and display the tree with the objects that we can access

[ahmetb]

This should be a user visible warning if anything (not a -v=2).

Ideally we still fail, but the error can say "use -ignore-errors to continue", and that's when it works like this. What do you think?

[carlossg]

should it force the user to always use the flag (it can be too annoying) or just print a line for each item that could not be fetched?

[ahmetb]

I think printing warning can be ok, but ideally at least there should be a way to still fail if that's what a user wants.