add list of cloud servers that would be destroyed without --force

[sgsullivan]

ssullivan@data2 ~ $ lw cloud server destroy --uniq-id=U3J8ZP,PDJ8ZP 
DANGER! This will destroy ALL Cloud Servers listed below:

        uniq_id: U3J8ZP hostname: geey.m2z5wyh924.io
        uniq_id: PDJ8ZP hostname: 5jr0.32e44iv41n.io

Tip: Avoid future confirmations by passing --force

This is a destructive operation. Continue? > yes
destroyed: U3J8ZP (geey.m2z5wyh924.io)
destroyed: PDJ8ZP (5jr0.32e44iv41n.io)
ssullivan@data2 ~ $ lw cloud server create --config-id 31 --template DEBIAN_10_UNMANAGED --zone 40460
Cloud server with uniq-id [L50LSH] creating. Check status with 'cloud server status --uniq-id L50LSH'
ssullivan@data2 ~ $ lw cloud server create --config-id 31 --template DEBIAN_10_UNMANAGED --zone 40460
Cloud server with uniq-id [LWTSWE] creating. Check status with 'cloud server status --uniq-id LWTSWE'
ssullivan@data2 ~ $ lw cloud server destroy --uniq-id L50LSH,LWTSWE --force 
destroyed: L50LSH
destroyed: LWTSWE
ssullivan@data2 ~ $