Generate the code of api_client in a github action

[tloubrieu-jpl]

Motivation

...so that the api_client is automatically updated when the specification is updated. Also so that we have the generated code releases traceable in a repo (currently the release packages are only kept in pypi)

Additional Details

We can alo add integration tests in the github action

Acceptance Criteria

Given
When I perform
Then I expect

Engineering Details

[jordanpadams]

not super critical, so deferring to next build