lint: freeze & run Black version 24.02

[Borda]

Issue #, if available:
set a single black version to ensure reproducibility
UPDATE: seem that the latest Black would need to be applied

Description of changes:
freeze Black version, but the better way is in #3111

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cc: @jaheba @kashif @lostella

[Borda]

@jaheba @kashif @lostella all it is generated by Blck, but maybe you will feel more confident running/applying it on your own... 🦩

[Borda]

This test is failing but only on py3.8 so it is strange and maybe flaky?
FAILED test/mx/model/deep_factor/test_model.py::test_accuracy[constant-True] - assert 0.3266171349419488 <= 0.3

[lostella]

Flaky test

[Borda]

Flaky test

playing with flaky over here: #3132

[Borda]

@lostella mind checking it again, pls 🐿️
all seems to be 🟢

[Borda]

@lostella, if you would have a chance to check it, it would be great to finish it 🦩

[Borda]

@lostella, is there still anything I need to change? 🐿️

[lostella]

@Borda maybe it's better not to freeze the black version. For example, vulnerabilities are found in black versions prior to 24.3.0, see https://github.com/awslabs/gluonts/security/dependabot/17

[Borda]

@lostella I see your point but from developer's perspective it is easier to have it frozen so you won't si sudden changes or broken lint, which would be unrelated to a contributor work, but instead move the black version to requorements/lint.txt and dependable which would periodically check and bump via PR so you will have it still up-to-date but fully under control... :) if you want I can do that in another PR :)

[lostella]

but instead move the black version to requorements/lint.txt and dependable which would periodically check and bump via PR so you will have it still up-to-date but fully under control

yes, I think that would be much better!

[Borda]

yes, I think that would be much better!

OK so, could we please land this with just update and I will prepare another with the automated process so it is separately and easier to review...

[Borda]

@lostella in fact this pre-commit if the bot is installed can do this version check and update, see: #3111