* sync charm-helpers to classic charms
* change openstack-origin/source default to zed
* align testing with zed
* add new zed bundles
* add zed bundles to tests.yaml
* add zed tests to osci.yaml and .zuul.yaml
* update build-on and run-on bases
* add bindep.txt for py310
* sync tox.ini and requirements.txt for ruamel
* use charmcraft_channel 2.0/stable
* drop reactive plugin overrides
* move interface/layer env vars to charmcraft.yaml
* enable qos service plugin for neutron-api to ensure
migrate-ovn-db action is successful
Change-Id: I6f94ff3e557413b6096493f839c0a5f217c017d3
Closes-Bug: #1988089
The charm-helpers project have re-licensed to Apache 2.0
inline with the agreed licensing approach to intefaces,
layers and charms generally.
Resync helpers to bring charmhelpers inline with charm
codebase.
Change-Id: I1b988a174d4a236599cffef8334a2923bf031fff
