duplicate ways to change working dir for deploy

[rdallman]

currently, deploying a function in another directory can be done in 2 ways:

$ cli deploy func-dir
$ cli deploy --working-dir func-dir

can we reduce this to one or the other? is there a good reason for both of these? there was a bug in deploy all for not adhering to the first one, but open question here.

[carimura]

i'm not opposed to getting rid of the first way although it's consistent with fn init (and others) where the docs commonly use that format (ie fn init hello-func)