python-common: replace types for extra_*_args with ArgSpec based types

python-common: replace types for extra_*_args with ArgSpec based types

Use the ArgSpec, ArgumentList, and GeneralArgList types throughout
the deployment module to support extra_container_args and
extra_entrypoint_args. The GeneralArgList type supports all possible
input forms while ArgumentList reflects the internal representation
of the argument lists.

Signed-off-by: John Mulligan <jmulligan@redhat.com>
(cherry picked from commit 925e09a46437bf9a8de0d7b853cdc3126ffe4260)

Conflicts:
	src/python-common/ceph/deployment/service_spec.py