Allow passing custom arguments to gardenctl ssh <gcp_node>

[dansible]

It would be great to be able to run commands on the remote host (ie gardenctl ssh to <gcp_node> echo true && exit)

[tedteng]

 gg ssh shoot--i333878--az-az-001-worker-bt6i6-z3-65ff4-tvpdb exit

Warning:
Be aware that you are entering an untrusted environment!
Do not enter credentials or sensitive data within the ssh session that cluster owners should not have access to.

Downloaded id_rsa key
Check Public IP

(1/4) Fetching data from target shoot cluster
Standard
Data fetched from target shoot cluster.

(2/4) Configuring Azure
Opened SSH Port.

Create public ip
20.67.152.170
Waiting 5 s until public ip is available.

Add public ip to nic

Waiting 30 seconds until ports are open.
(3/4) Establishing SSH connection

Warning: Permanently added '20.67.152.170' (ED25519) to the list of known hosts.

(4/4) Cleanup

  (1/3) Remove SSH rule

  (2/3) Remove public ip from nic

  (3/3) Delete public ip

Configuration successfully cleaned up.

[tedteng]

gg ssh shoot--i333878--az-az-001-worker-bt6i6-z3-65ff4-tvpdb ls /tmp

Warning:
Be aware that you are entering an untrusted environment!
Do not enter credentials or sensitive data within the ssh session that cluster owners should not have access to.

Downloaded id_rsa key
Check Public IP

(1/4) Fetching data from target shoot cluster
Standard
Data fetched from target shoot cluster.

(2/4) Configuring Azure
Opened SSH Port.

Create public ip
20.67.153.119
Waiting 5 s until public ip is available.

Add public ip to nic

Waiting 30 seconds until ports are open.
(3/4) Establishing SSH connection

Warning: Permanently added '20.67.153.119' (ED25519) to the list of known hosts.
systemd-private-797de8692c7e4d4eaa64d24bf5bc7104-systemd-logind.service-wQ0o1e
systemd-private-797de8692c7e4d4eaa64d24bf5bc7104-systemd-resolved.service-iH8Teg
systemd-private-797de8692c7e4d4eaa64d24bf5bc7104-systemd-timesyncd.service-OpQwgi

(4/4) Cleanup

  (1/3) Remove SSH rule

  (2/3) Remove public ip from nic

  (3/3) Delete public ip

Configuration successfully cleaned up.