script/build-with-container: add a common packages target

script/build-with-container: add a common packages target

Add a `packages` target to build-with-container.py that requests a build
of packages, whatever package type is native to the distro selected.
For example `./src/script/build-with-container.py -d ubuntu22.04 -e
packages` will automatically select a deb packages build where
`./src/script/build-with-container.py -d centos9 -e packages` will
trigger rpm packages to be built. The underlying package-type specific
targets remain unchanged.

Signed-off-by: John Mulligan <jmulligan@redhat.com>
(cherry picked from commit 37b7d509c59348ae11badd6673cb49ce9ce303fa)