Split general version info functions of cmk.ccc.version

... into cmk.ccc.version_info to get version as simple imporatable module

This makes it possible to use e.g. Version or Edition from version.py
without all dependancy packages of checkmk and the need for a venv

Prepare for CMK-37300

Change-Id: Ied949e6971434b07d5df5dd86a4c3a69a2ac7571