Revert "[docker-mgmt-framework]: update mgmt framework docker to support sonic-cli cmd"

[renukamanavalan]

Reverts #6148.

Causes debug build failure.

When building docker-sonic-mgmt-framework-dbg, openssl-client will be installed, it will add a group as below. During the docker build, the /host_etc does not exist.

johnar@0c7bd7e98baf:/sonic/dockers/docker-sonic-mgmt-framework$ grep openssh Dockerfile-dbg 
RUN apt-get update && apt-get install -f -y gdb gdbserver vim openssh-client sshpass strace

I have no name!@fd2a27db6a3c:/# /usr/sbin/groupadd -g 100 ssh
groupadd: cannot open /etc/group
I have no name!@fd2a27db6a3c:/#

I have no name!@fd2a27db6a3c:/# ls /etc/group -l
lrwxrwxrwx 1 0 0 15 Jun 14 10:08 /etc/group -> /host_etc/group

[jeff-yin]

I don't understand how reverting #6148 fixes the issue described in the problem description.
If the problem is due to the fact that openssh-client is being installed, that installation was introduced by fc55329 which was merged last year. So what else changed recently?