Pass TDP client API as a Redux middleware

[PaulFarault]

Currently, an instance of the TDP client API is initialized (after authentication and config loading) and store in a context. To fetch data (variables for example):

1. The client is used directly inside the component
2. The fetch result is then passed to Redux
3. A selector is finally used to update the page based on the Redux store

It would be best to pass the client as a Redux middleware and to fetch data directly with Redux using thunks.

[PaulFarault]

Would be interesting to study if using RTK Query along with their OpenAPI code generator would solve our problems.