bugtool: Add structured node and health output
bugtool: Add structured node and health output

This commit adds the `-o json` output to `cilium node list` and
`cilium-health status`, as the text version of both does not contain all
details.

Signed-off-by: Sebastian Wicki <db043b2055cb3a47b2eb0b5aebf4e114a8c24a5a@isovalent.com>

michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,cilium/cilium