fix(debian) Add missing packages to allow git cloning by ssh

[gounthar]

With the help of @dduportal I added the minimal list of packages that are needed to be able to clone via ssh for the Debian image.
It's an attempt to solve #322.

Current situation

The list of packages brought by installing git is:

git-man libcurl3-gnutls liberror-perl libgdbm-compat4 libgdbm6 libperl5.32 perl perl-modules-5.32

We're missing at least openssh-client .

Before regression

The list of packages brought by installing git was:

git-man less libbsd0 libcbor0 libcurl3-gnutls libedit2 liberror-perl libfido2-1 libgdbm-compat4 libgdbm6 libmd0 libperl5.32 libx11-6 libx11-data libxau6 libxcb1 libxdmcp6 libxext6 libxmuu1 netbase openssh-client patch perl perl-modules-5.32
  xauth

What should be added

openssh-client patch less netbase

Tests

We added two tests which try to find the ssh binary thanks to command -v and then launch ssh -V to get the ssh version and a 0 return code.

By the way, it also showed that the ArchLinux image was failing that test, so we added the openssh package too for this Dockerfile.

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[MarkEWaite]

Looks good to me.