Add support for mounting volumes into ephemeral container

[gberche-orange]

Thanks for sharing this great plugin with the community !

As a kubectl-netshoot user,
In order to inspect mounted volumes in a pod, such as secrets, configmaps or volumes that can be mounted more than once,
I need an kubectl-netshoot option to craft the ephemeral container with volumeMounts from the pod

See kubernetes/kubectl#1071 (comment)

I started crafting some bash + jq script to do so, see WIP at https://github.com/orange-cloudfoundry/paas-templates/issues/1949#issuecomment-1549714130 but this feels snowflake. This seems much better located into kubectl-netshoot

[joebowbeer]

See https://github.com/bavarianbidi/kubectl-dpm?tab=readme-ov-file#kubectl-custom-debug-profiles

which leverages alpha custom profile support in 1.30

kubernetes/kubernetes#120346