Fix usage of `response_types_map` inside API client's `call_api` method.

[ndhansen]

Fixes https://github.com/tomplus/kubernetes_asyncio/issues/310

I didn't add tests because I couldn't see any existing tests for the call_api method, but if I missed it, please let me know.

I accidentally didn't read the contribution guidelines before creating this, I'll leave this in draft until the issue has been validated / accepted.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 28.70%. Comparing base (c2c8933) to head (7d5a549).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #311   +/-   ##
=======================================
  Coverage   28.70%   28.70%           
=======================================
  Files         725      725           
  Lines       86624    86626    +2     
=======================================
+ Hits        24864    24866    +2     
  Misses      61760    61760           

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[tomplus]

LGTM, but i can't merge it as is a "draft".