add SessionAuthHandler

[mishaschwartz]

Add weaver.cli.SessionAuthHandler class which uses the cookies stored in a pre-existing requests.Session instance to authenticate.

Alternative to #597 as discussed in https://github.com/crim-ca/weaver/pull/597#discussion_r1480537709

Closes #597

[mishaschwartz]

Ok, here's the new usage:

CLI:

weaver processes -aC weaver.cli.CookieAuthHandler -aT 'auth=thecookievaluethattshouldbeincluded' --url https://example.com/weaver

Client

s = requests.Session()
# add cookies to the session
client = WeaverClient("https://example.com/weaver", auth=CookieAuthHandler(token=s.cookies.get_dict()))

[mishaschwartz]

Note that because I made the changes in the RequestAuthHandler as discussed:

It would be fine with adding a pre-check to RequestAuthHandler that skips request_auth call when the token/cookie is predefined in the handler

it is possible to send a token to the BearerAuthHandler as well in a similar way (if you have the bearer token already)

[fmigneault]

@mishaschwartz You can add yourself to the contributors list in https://github.com/crim-ca/weaver/blob/master/AUTHORS.rst if you desire.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (d234e11) 85.65% compared to head (e7e3670) 85.66%. Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #599 +/- ## ========================================== + Coverage 85.65% 85.66% +0.01% ========================================== Files 79 79 Lines 18559 18580 +21 Branches 2844 2847 +3 ========================================== + Hits 15896 15917 +21 Misses 1926 1926 Partials 737 737 ```

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[fmigneault]

@mishaschwartz FYI https://github.com/crim-ca/weaver/tree/5.1.0

[fmigneault]

@mishaschwartz Due to a CI issue with https://github.com/crim-ca/weaver/tree/5.1.0, I pushed another https://github.com/crim-ca/weaver/tree/5.1.1. The docker image for it should be ready soon.