Check that string probe port match container port

[jouve]

implementation of #455

if a probe port is a string and the string is not of number (like "1234" ) and the string is not in the container ports (ie. ` ports[].name), then raise a diagnostic message.

while the resource it accepted by kube currently, the liveness/readiness/startup will fail anyway, so added to default checks.

[janisz]

@jouve You need to regenerate files

[jouve]

I'll update this PR soon :)

[janisz]

@jouve ping

[janisz]

@jouve Could you rebase? I think we can make it into next release Don't forget to rerequest review ⟳