feat(Auth): Using helpers for passwordless workflows

[harsh62]

Description

The PR aims to refactor MagicLink and OTP, to helpers so that code can be reused.

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: 84 lines in your changes are missing coverage. Please review.

Comparison is base (87b603f) 67.99% compared to head (2dd8853) 68.01%.

Files	Patch %	Lines
.../Operations/Helpers/PasswordlessSignInHelper.swift	67.77%	58 Missing ⚠️
...ions/Helpers/PasswordlessConfirmSignInHelper.swift	68.57%	22 Missing ⚠️
...hPlugin/Support/Helpers/MagicLinkTokenParser.swift	80.95%	4 Missing ⚠️

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Additional details and impacted files

@@                    Coverage Diff                     @@
##           feat/auth-passwordless    #3390      +/-   ##
==========================================================
+ Coverage                   67.99%   68.01%   +0.01%     
==========================================================
  Files                        1091     1094       +3     
  Lines                       36583    36437     -146     
==========================================================
- Hits                        24873    24781      -92     
+ Misses                      11710    11656      -54     

Flag	Coverage Δ
API_plugin_unit_test	67.07% <ø> (ø)
AWSPluginsCore	64.59% <ø> (ø)
Amplify	47.46% <ø> (ø)
Analytics_plugin_unit_test	81.16% <ø> (ø)
Auth_plugin_unit_test	79.31% <73.66%> (+0.20%)	⬆️
CoreMLPredictions_plugin_unit_test	59.44% <ø> (ø)
DataStore_plugin_unit_test	80.05% <ø> (+0.03%)	⬆️
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	68.01% <73.66%> (+0.01%)	⬆️

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[thisisabhash]

LGTM