* update kvtool
* add env vars for e2e automated upgrades
* run kvtool with upgrade flags when enabled
* add e2e test placeholder for upgrade handler tests
* allow override of kvtool's kava.configTemplate
* use the correct image tag when running e2e tests
* update kvtool
* always docker-build when running make test-e2e
* refactor skip shutdown to always skip shutdown
* add CtxAtHeight grpc helper
* add Community & Earn queriers
* expose UpgradeHeight in suite
* document e2e chain upgrades
* add reference to example branch
