collect-logs should attempt to capture cloud-init version using more than dpkg

This bug was originally filed in Launchpad as [LP: #1820609](https://bugs.launchpad.net/cloud-init/+bug/1820609)

Launchpad details

affected_projects = []

assignee = None

assignee_name = None

date_closed = None

date_created = 2019-03-18T13:42:10.489808+00:00

date_fix_committed = None

date_fix_released = None

id = 1820609

importance = low

is_complete = False

lp_url = https://bugs.launchpad.net/cloud-init/+bug/1820609

milestone = None

owner = oddbloke

owner_name = Dan Watkins

private = False

status = triaged

submitter = oddbloke

submitter_name = Dan Watkins

tags = []

duplicates = []

_Launchpad user **Dan Watkins(oddbloke)** wrote on 2019-03-18T13:42:10.489808+00:00_

dpkg is only present on Debian derivatives; we should attempt to use other package management tools during `cloud-init collect-logs` to improve our chances of getting a useful version number in the collected tarball.