Disable weekly checks for python 3.12 (#1720)

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### Summary

This PR disables the weekly stability checks for Python 3.12. For the
CLI fuzzing tests, the weekly checks depend on the Atheris package,
which is not compatible with Python 3.12 at this moment.

As a temporary fix, I am disabling the weekly checks for Python 3.12.
This is safe, because the fuzzing tests still run for Python <= 3.11.
For a long term solution, we need to wait until Python 3.12 support is
added to Atheris, or switch to a different package for fuzzing tests.

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Resolves #111 and #222.
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### How to test
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### Checklist
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- [ ] I have added unit tests to cover my changes.​
- [ ] I have added integration tests to cover my changes.​
- [ ] I have added the description of my changes into
[CHANGELOG](https://github.com/openvinotoolkit/datumaro/blob/develop/CHANGELOG.md).​
- [ ] I have updated the
[documentation](https://github.com/openvinotoolkit/datumaro/tree/develop/docs)
accordingly

### License

- [x] I submit _my code changes_ under the same [MIT
License](https://github.com/openvinotoolkit/datumaro/blob/develop/LICENSE)
that covers the project.
  Feel free to contact the maintainers if that's a concern.
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below).

```python
# Copyright (C) 2024 Intel Corporation
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# SPDX-License-Identifier: MIT
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Author: djdameln

.github/workflows/weekly_check.yml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.9', '3.10', '3.11']
         extra: ['default', 'tf', 'tfds', 'torch']
         include:
           - python-version: "3.9"
@@ -28,8 +28,6 @@ jobs:
             tox-env-py: "310"
           - python-version: "3.11"
             tox-env-py: "311"
-          - python-version: "3.12"
-            tox-env-py: "312"
     name: stability test (Python ${{ matrix.python-version }}, Extra ${{ matrix.extra }})
     runs-on: ubuntu-latest
     steps: