We have to sets of functions that deal with the information about Metabase version.
1. During build process we create `version.properties` file
2. During release we create new `version-info.json` or `version-info-ee.json` files that we store in AWS

The first contains the information about the current Metabase version.
It's used to generate info in "About Metabase" window, among others.

Calling both namespaces `version-info` leads to unnecessary confusion.
This commit should make the disctinction between the two more obvious and clear.