from your log:
SSHDConfig: Error: command ['/usr/sbin/sshd', '-T'] failed with exit code 255:
Missing privilege separation directory: /run/sshd
Feb 21 18:47:43 turagit01 sshd: error: Bind to port 22 on 192.168.1.15
failed: Cannot assign requested address.
Feb 21 18:47:43 turagit01 sshd: fatal: Cannot bind any address.
Feb 21 18:47:43 turagit01 systemd: ssh.service: Main process exited,
Those seem to be two separate issues, the one thing they share is that
they seem to be cusotm configuration that has gone wrong.
sshd -T is the "test my config" before it starts.
If you fix the configuration of your ssh server I'm pretty sure the upgrade
See  for an example how to restore a conffile to the original version
if you don't want to edit your changes manually, but just revert.
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package openssh-server 1:7.5p1-10ubuntu0.1 failed to install/upgrade:
subprocess installed post-installation script returned error exit
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