further automate the openapi-to-pyclientlib process

[marc-portier]

since all this code is in fact generated we could go the extra mile of having this completely running out of the box

so thinking about having separated branches

• generated --> holding the vanila code as generated
• testing --> adding manual specific tests versus some available service implementation

then some githubaction could be made that

• runs on some cron interval
• fetching the openapi spec, and checking its validity and version
• if version is new and spec is valid --> generate new version and push to generated
• if generation fails --> bail out and notify
• merge updates into the testing branch
• run tests, if they fail --> bail out and notify
• create a new release

@RoryMMMM actually found an action that promises something in this direction: https://github.com/marketplace/actions/generate-client-library-w-the-openapitools-generator