We use reno>=4.1.0 features to combine release notes from
a bunch of release notes files. Reno uses git tags
to figure out which release notes files to include
to a given release.
When building charts for deployment tests we skip
generating CHANGELOG.md files.
Change-Id: I2f55e76844afa05139a5c4b63ecb6c0ae2bcb5b2
7a403d5db2