[REQ] add no_proxy support to python client

Created by: itaru2622

Is your feature request related to a problem? Please describe.

add 'no_proxy' feature supporting in python client besides current 'proxy' and 'proxy_headers' features.

there is no 'no_proxy' feature in current python client as below:

https://github.com/OpenAPITools/openapi-generator/blob/c16562995b2a19615c9e355a73091732257aa93f/modules/openapi-generator/src/main/resources/python/configuration.mustache#L278-L283

https://github.com/OpenAPITools/openapi-generator/blob/c16562995b2a19615c9e355a73091732257aa93f/modules/openapi-generator/src/main/resources/python/rest.mustache#L67-L69

as the result, it needs to set/unset proxy parameter according to the destinations.

for example, kubernets(CNCF) provides its API in openapi definition. and CNCF official python client, using the code generated by openapi-generator, access to cloud servers as well as on-premise servers. as the result, user needs to set/unset proxy parameter according to the destinations. it is bothering task.

Describe the solution you'd like

add no_proxy parameter in configuration.py, then rest.py chooses either ProxyManager or PoolManager according to the parameters(proxy and no_proxy).

Describe alternatives you've considered

Additional context