feat: modify config-ssh to set the host suffix - #17280

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# This section is managed by coder. DO NOT EDIT.
#
# You should not hand-edit this section unless you are removing it, all
# changes will be lost when running "coder config-ssh".
#
# Last config-ssh options:
# :hostname-suffix=spiketest
#
Host coder.* *.spiketest
        ConnectTimeout=0
        StrictHostKeyChecking=no
        UserKnownHostsFile=/dev/null
        LogLevel ERROR
        ProxyCommand /home/coder/repos/coder/build/coder_config_ssh --global-config /home/coder/.config/coderv2 ssh --stdio --ssh-host-prefix coder. --hostname-suffix spiketest %h
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