Build a release tool to control the release process

The release has mentioned in the roadmap issue is a combination of multiple steps.

It would be beneficial to build a small release tool to coordinate the steps. The idea would be to make the interface simple enough for other members of the release team to operate and to make it in a modular manner to extend it as needed.

The initial planned items that the release tool should be capable of doing:

• Spawning the release process.
• Generate the Go/No-Go document end to end which means it should be capable to interact with changelog-aggregator and other tools
• Complete the final release steps such as interacting with origin to move the artefacts, update SDK, CF templates update etc

This is part of the roadmap item #632

Blocked on #838