When working on changelog, Marco suggested in
https://github.com/citusdata/citus/pull/6856#pullrequestreview-1386601215
that we should bump columnar version to 11.3 as well.
This PR aims to contain all the necessary changes to allow upgrades to
and downgrades from 11.3.0 for columnar. Note that updating citus
extension version does not affect columnar as the two extension versions
are not really coupled.
The same changes will also be applied to the release branch in
https://github.com/citusdata/citus/pull/6897
* Support upgrade and downgrade and separate columnar as citus_columnar extension
Co-authored-by: Yanwen Jin <yanwjin@microsoft.com>
Co-authored-by: Jeff Davis <jeff@j-davis.com>