feat(sdk): migrate unit test from urllib3-mock to MagicMock

[naufalandika]

Description

Right now we use urllib3-mock to merlin-sdk's http request. But urllib3-mock is not maintained anymore since 2015 and doesn't work with python 3.11++ because they still use some functions that's removed in python 3.11. Because we want to support python 3.11++ in our sdk we need to migrate the unit test away from urllib3-mock to MagicMock

Modifications

• Remove all function calls related to urllib3-mock
• Refactor unit test to use MagicMock

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.94%. Comparing base (9b0ccd2) to head (01479a7).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #405   +/-   ##
=======================================
  Coverage   95.94%   95.94%           
=======================================
  Files          26       26           
  Lines        2098     2098           
=======================================
  Hits         2013     2013           
  Misses         85       85           

Flag	Coverage Δ
sdk-test-3.10	95.94% <ø> (ø)
sdk-test-3.11	95.94% <ø> (?)
sdk-test-3.12	95.94% <ø> (?)
sdk-test-3.8	?
sdk-test-3.9	95.94% <ø> (ø)

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