Add command: d8 k debug

[tarabrind]

Add a wrapper for the kubectl debug command in the form of the d8 k debug command, which runs the debug-contaier built in DKP.

# d8 k debug --help
Debug cluster resources using interactive debugging containers.
          <gap>
Options:
          <gap>
    --image='':
	Container image to use for debug container. If not specified, the platform's recommended image will be used.

# d8 k debug -n d8-cni-cilium agent-g6bg2 -it -- bash
Using debug container image: dev-registry.deckhouse.io/sys/deckhouse-oss@sha256:c8491f461738f32ac3a40338b031421978b8a40e8ca2c51ee8ba9387462c6b23
Defaulting debug container name to debugger-xjst2.
If you don't see a command prompt, try pressing enter.
bash-5.2#

# d8 k debug -n d8-cni-cilium agent-g6bg2 -it --image=busybox -- sh
Defaulting debug container name to debugger-q75jt.
If you don't see a command prompt, try pressing enter.
/ #

Related PR in Deckhouse: deckhouse/deckhouse#13001