Add requests wrappers
This PR introduces igwn_auth_utils.requests
, which provides an IGWN auth mixin class for requests.Session
to simplify use of the auth discovery methods in that context.
This is heavily influenced by requests-gracedb
so @lpsinger should be involved in any discussion on reducing the overlap between that project and this one to provide a single requests
wrapper for X.509/scitokens clients.