feat(auth): add URLSession client

[thisisabhash]

Issue #

None

Description

• Add URLSession Client for making HTTP calls to API Gateway Endpoint

General Checklist

• Added new tests to cover change, if needed
• Build succeeds with all target using Swift Package Manager
• All unit tests pass
• All integration tests pass
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Documentation update for the change if required
• PR title conforms to conventional commit style
• New or updated tests include Given When Then inline code documentation and are named accordingly testThing_condition_expectation()
• If breaking change, documentation/changelog update with migration instructions

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

Attention: 45 lines in your changes are missing coverage. Please review.

Comparison is base (87b603f) 67.99% compared to head (9db7923) 67.88%.
Report is 1 commits behind head on feat/auth-passwordless.

Files	Patch %	Lines
...pport/Passwordless/AWSAuthPasswordlessClient.swift	7.14%	39 Missing ⚠️
...rt/Passwordless/PreInitiateAuthSignUpPayload.swift	0.00%	6 Missing ⚠️

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Additional details and impacted files

@@                    Coverage Diff                     @@
##           feat/auth-passwordless    #3387      +/-   ##
==========================================================
- Coverage                   67.99%   67.88%   -0.11%     
==========================================================
  Files                        1091     1093       +2     
  Lines                       36583    36636      +53     
==========================================================
- Hits                        24873    24870       -3     
- Misses                      11710    11766      +56     

Flag	Coverage Δ
API_plugin_unit_test	67.07% <ø> (ø)
AWSPluginsCore	64.59% <ø> (ø)
Amplify	47.48% <ø> (+0.01%)	⬆️
Analytics_plugin_unit_test	81.16% <ø> (ø)
Auth_plugin_unit_test	78.66% <16.66%> (-0.46%)	⬇️
CoreMLPredictions_plugin_unit_test	59.44% <ø> (ø)
DataStore_plugin_unit_test	80.07% <ø> (+0.04%)	⬆️
Geo_plugin_unit_test	70.75% <ø> (ø)
Logging_plugin_unit_test	63.09% <ø> (ø)
Predictions_plugin_unit_test	37.29% <ø> (ø)
PushNotifications_plugin_unit_test	87.03% <ø> (ø)
Storage_plugin_unit_test	78.00% <ø> (ø)
unit_tests	67.88% <16.66%> (-0.11%)	⬇️

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