Unset `metadata_from` + rollback to Python 3.10

[benoit74]

Rationale

• we should release a 2.2.0 asap with current main status since this would solve #184 (which is blocking all scrapers) but:
  • there is a strange error about metadata_from when running the scraper with youtube2zim-playlists ; it is obviously harmless to simply disable this code since it is not possible to setup the metadata_from which current code anyway
  • main is in fact not correct, it is using Python 3.11 while we are still at zimscraperlib 2.0 which supports only Python 3.10 (don't know why this is not causing a problem in Docker build + why it does not raised a red flag before)

Changes

• set metadata_from to always be None for now
• rollback to Python 3.10
• align zimscraperlib version constraints in hatch dependencies with project version (just in case)

[codecov[bot]]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (a0e0300) 1.83% compared to head (bd67bbb) 1.83%.

Files	Patch %	Lines
src/youtube2zim/playlists/scraper.py	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #185 +/- ## ===================================== Coverage 1.83% 1.83% ===================================== Files 10 10 Lines 928 928 Branches 164 147 -17 ===================================== Hits 17 17 Misses 911 911 ```

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[benoit74]

I propose to ignore codecov warning, since the file is not covered at all anyway.

[benoit74]

I just fixed the PR title which was wrong indeed.