Improve bash completion for `stack deploy`
Improve bash completion for `stack deploy`

This adds completion of stack names, which is very useful when updating
existing stacks.

Signed-off-by: Harald Albers <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@albersweb.de>

riyazdf/cli,riyazdf/cli