fix(datastore): decode optimistically with paginated list response type

[5d]

Issue #

#3259

Description

• decoding the PaginatedList optimistically

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

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (fix/gh-3259@3d142c1). Click here to learn what that means.

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Additional details and impacted files

@@              Coverage Diff               @@
##             fix/gh-3259    #3474   +/-   ##
==============================================
  Coverage               ?   68.11%           
==============================================
  Files                  ?     1080           
  Lines                  ?    36377           
  Branches               ?        0           
==============================================
  Hits                   ?    24779           
  Misses                 ?    11598           
  Partials               ?        0           

Flag	Coverage Δ
API_plugin_unit_test	67.07% <0.00%> (?)
AWSPluginsCore	64.18% <0.00%> (?)
Amplify	48.10% <0.00%> (?)
Analytics_plugin_unit_test	81.16% <0.00%> (?)
Auth_plugin_unit_test	78.96% <0.00%> (?)
CoreMLPredictions_plugin_unit_test	59.44% <0.00%> (?)
DataStore_plugin_unit_test	81.62% <0.00%> (?)
Geo_plugin_unit_test	70.75% <0.00%> (?)
Logging_plugin_unit_test	63.34% <0.00%> (?)
Predictions_plugin_unit_test	37.16% <0.00%> (?)
PushNotifications_plugin_unit_test	87.13% <0.00%> (?)
Storage_plugin_unit_test	77.51% <0.00%> (?)
unit_tests	68.11% <0.00%> (?)

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