[python][client] Clean up samples and CI (#17509)

* 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

samples/client/echo_api/python-disallowAdditionalPropertiesIfNotPresent/docs/AuthApi.md

@@ -0,0 +1,157 @@
+# openapi_client.AuthApi
+
+All URIs are relative to *http://localhost:3000*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**test_auth_http_basic**](AuthApi.md#test_auth_http_basic) | **POST** /auth/http/basic | To test HTTP basic authentication
+[**test_auth_http_bearer**](AuthApi.md#test_auth_http_bearer) | **POST** /auth/http/bearer | To test HTTP bearer authentication
+
+
+# **test_auth_http_basic**
+> str test_auth_http_basic()
+
+To test HTTP basic authentication
+
+To test HTTP basic authentication
+
+### Example
+
+* Basic Authentication (http_auth):
+
+```python
+import openapi_client
+from openapi_client.rest import ApiException
+from pprint import pprint
+
+# Defining the host is optional and defaults to http://localhost:3000
+# See configuration.py for a list of all supported configuration parameters.
+configuration = openapi_client.Configuration(
+    host = "http://localhost:3000"
+)
+
+# The client must configure the authentication and authorization parameters
+# in accordance with the API server security policy.
+# Examples for each auth method are provided below, use the example that
+# satisfies your auth use case.
+
+# Configure HTTP basic authorization: http_auth
+configuration = openapi_client.Configuration(
+    username = os.environ["USERNAME"],
+    password = os.environ["PASSWORD"]
+)
+
+# Enter a context with an instance of the API client
+with openapi_client.ApiClient(configuration) as api_client:
+    # Create an instance of the API class
+    api_instance = openapi_client.AuthApi(api_client)
+
+    try:
+        # To test HTTP basic authentication
+        api_response = api_instance.test_auth_http_basic()
+        print("The response of AuthApi->test_auth_http_basic:\n")
+        pprint(api_response)
+    except Exception as e:
+        print("Exception when calling AuthApi->test_auth_http_basic: %s\n" % e)
+```
+
+
+
+### Parameters
+
+This endpoint does not need any parameter.
+
+### Return type
+
+**str**
+
+### Authorization
+
+[http_auth](../README.md#http_auth)
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+
+### HTTP response details
+
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+**200** | Successful operation |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+
+# **test_auth_http_bearer**
+> str test_auth_http_bearer()
+
+To test HTTP bearer authentication
+
+To test HTTP bearer authentication
+
+### Example
+
+* Bearer Authentication (http_bearer_auth):
+
+```python
+import openapi_client
+from openapi_client.rest import ApiException
+from pprint import pprint
+
+# Defining the host is optional and defaults to http://localhost:3000
+# See configuration.py for a list of all supported configuration parameters.
+configuration = openapi_client.Configuration(
+    host = "http://localhost:3000"
+)
+
+# The client must configure the authentication and authorization parameters
+# in accordance with the API server security policy.
+# Examples for each auth method are provided below, use the example that
+# satisfies your auth use case.
+
+# Configure Bearer authorization: http_bearer_auth
+configuration = openapi_client.Configuration(
+    access_token = os.environ["BEARER_TOKEN"]
+)
+
+# Enter a context with an instance of the API client
+with openapi_client.ApiClient(configuration) as api_client:
+    # Create an instance of the API class
+    api_instance = openapi_client.AuthApi(api_client)
+
+    try:
+        # To test HTTP bearer authentication
+        api_response = api_instance.test_auth_http_bearer()
+        print("The response of AuthApi->test_auth_http_bearer:\n")
+        pprint(api_response)
+    except Exception as e:
+        print("Exception when calling AuthApi->test_auth_http_bearer: %s\n" % e)
+```
+
+
+
+### Parameters
+
+This endpoint does not need any parameter.
+
+### Return type
+
+**str**
+
+### Authorization
+
+[http_bearer_auth](../README.md#http_bearer_auth)
+
+### HTTP request headers
+
+ - **Content-Type**: Not defined
+ - **Accept**: text/plain
+
+### HTTP response details
+
+| Status code | Description | Response headers |
+|-------------|-------------|------------------|
+**200** | Successful operation |  -  |
+
+[[Back to top]](#) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to Model list]](../README.md#documentation-for-models) [[Back to README]](../README.md)
+