hostagent: Log ssh forwarding command

We log a message when forwarding to guest unix socket, but it is not
clear from the log how this is implemented, and the code is confusing
(using ssh forwarding when using GRPC forwarding). Let's make this more
clear by logging the ssh forwarding command.

Example logs:

    {"level":"debug","msg":"Forwarding unix sockets","time":"2025-07-06T15:59:43+03:00"}

    {"level":"info","msg":"Forwarding \"/run/user/501/podman/podman.sock\" (guest) to
        \"/Users/nir/.lima/podman/sock/podman.sock\" (host)","time":"2025-07-06T15:59:43+03:00"}

    {"level":"debug","msg":"Running \"/usr/bin/ssh -F /dev/null -o IdentityFile=\\\"/Users/nir/.lima/_config/user\\\"
        -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o NoHostAuthenticationForLocalhost=yes
        -o PreferredAuthentications=publickey -o Compression=no -o BatchMode=yes -o IdentitiesOnly=yes
        -o GSSAPIAuthentication=no -o Ciphers=\\\"^[email protected],[email protected]\\\" -o User=nir
        -o ControlMaster=auto -o ControlPath=\\\"/Users/nir/.lima/podman/ssh.sock\\\" -o ControlPersist=yes -T
        -O forward -L /Users/nir/.lima/podman/sock/podman.sock:/run/user/501/podman/podman.sock -N -f -p 53505
        127.0.0.1 --\"","time":"2025-07-06T15:59:43+03:00"}

Signed-off-by: Nir Soffer <[email protected]>

Author: nirs

pkg/hostagent/hostagent.go

@@ -758,6 +758,7 @@ func forwardSSH(ctx context.Context, sshConfig *ssh.SSHConfig, port int, local,
 		}
 	}
 	cmd := exec.CommandContext(ctx, sshConfig.Binary(), args...)
+	logrus.Debugf("Running %q", cmd)
 	if out, err := cmd.Output(); err != nil {
 		if verb == verbForward && strings.HasPrefix(local, "/") {
 			if reverse {