cli: more generic interactive parameter definition

cli: more generic interactive parameter definition

Instead of hardcoding 'password' as a special case in the
JSONSchema's getopt handling, extend the new parameter
mapping to allow defining a parameters as 'interactive'.
They also take an optional argument on the command line
directly.

This effectively deprecates the password special case which
should be replaced in pct/pveum/... and then dropped in
pve-common.

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>