Python 3.12 has been released in October 2023, it should be tested in
the CI.
Python 3.7 is not maintained anymore, removing it from the minimum
required version in `pyproject.toml` files.
* chore: Remove leftover Github action file
This was probably added by mistake. A similar file is active in
.github/workflows/samples-python-pydantic-v1-petstore.yaml.
* chore: Remove leftover VERSION from old python-experimental sample
* ci: Stop running Python integration tests in Circle CI
These Python clients are all tested with Github Actions already, which
is faster, more cleanly separated and only runs on modifications.
I'm not cleaning up the pydantic-v1 client, I expect it to be removed soon anyway.
* chore: Remove true from sample folder name
python-disallowAdditionalPropertiesIfNotPresent-true
-> python-disallowAdditionalPropertiesIfNotPresent
