New service-integration library in osparc-simcore

[pcrespov]

As a step towards simplifying the full service integration workflow, we will start by removing some of the validation and tooling logic outside of the cookiecutter template.

• move cookiecutter tests and tools folder to an independent library in @pcrespov, then ...
• migrate relevant services to the new approach, i.e. removing these folders and use instead this library @KZzizzle

[pcrespov]

@KZzizzle Starting integrating library in #1963

[pcrespov]

obsolete. will follow up with new issues