token based login for flash scicat

[zain-sohail]

Suggested by @kutnyakhov in #345 , simple fix that only affects the flashloader so would be nice to merge quickly.

I will try to add tests, but might be tricky considering it's an API call.

[coveralls]

Pull Request Test Coverage Report for Build 8031202180

Details

• 43 of 46 (93.48%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.4%) to 91.525%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
sed/loader/flash/loader.py	2	3	66.67%
sed/loader/flash/metadata.py	10	12	83.33%

Totals
Change from base Build 8009411740:	0.4%
Covered Lines:	5983
Relevant Lines:	6537

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💛 - Coveralls

[zain-sohail]

I have added tests by mocking the requests from server.

The pytest fixture library for this is requests-mock.
Tests seems to run but on Pypi it said that it's only valid up to python 3.10 so I am not fully certain if it works on 3.11

[rettigl]

I added a manual workflow trigger for the multiversion tests, and ran them on this branch, seems to work fine also with 3.11

[rettigl]

LGTM. Good addition would be, as said, a mechanism to provide the token directly from the example notebook in a prepared fashion, so one does not have to edit config files all the time.

[rettigl]

I cannot really test this, as I don't have a scicat token, and don't know which URL to use. None if the FLASH metadata stuff is really documented in examples, I suggest this should be still added, so users understand what to do.
From reading the code, I think it should be fine.