* Add `ca_cert_data` parameter to Python client.
This lets a client validate a server's CA certificate chain using a
variable/constant containing PEM (`str`) or DER (`bytes`) data, rather than
needing to reference a file on disk.
* python: Fix `ca_cert_data` on Python 3.8
* 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
