Resolve GitHub timeouts

[tgrandje]

• create a class to manage every http requests (wether to the INSEE APIs, the IGN's or anything else) ;
• set a default timeout for each query (might be needed to extend this timeout later, but this seems ok in regard to existing tests)
• run all test on any python version
• run tests only on py 3.9 & 3.12
• add a version for pynsee, for 2 reasons :
  • traceability (giving the extension of current changes, I suggest the 0.2.0 version for pynsee)
  • and the IGN's geoplatform doesn't allow for a User-Agent without a "/blah" part, which is usually reserved to the current application's version.
• alter utils tests
• remove 404 tracking from INSEE's API results as this is a "no result found" code, not an error

I might have blundered here or there on the display of log entries, but I hope not too much.
This should be checked thoroughly and the black formatting will not make this an easy task, sorry about that...

[tgrandje]

Just added resolution to #231

[tgrandje]

Just in case we agree on that, I've also opened another branch which allows to track each API's current rate separatly using requests_ratelimiter.

[tgrandje]

Also :

• take care of need to allow pynsee usage without sirene's credentials #238
• fix some paths, still displaying version number in URLs, which are not displayed in the current portal (anymore ?)
• prune some unnecessary code while testing the API's correct access and make use of the new session object's built-in exception

[tgrandje]

Not a 100% sure of the latest commit.
I sure resolved some bugs, but I'm currently not working with a static proxy and cannot be certain of the proper proxy behaviour (I'll try to reinstall the environment on another machine). Please fill free to advice on it!