fix(datastore): reconnect the AppSyncRealTimeClient once connection is stale

[5d]

Issue #

#3632

Description

Currently, the AppSyncRealTimeClient disconnects the underlying websocket connection when it considers the connection stale. However, we need to maintain the connection for as long as possible. Therefore, change the action to reconnect.

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]

Codecov Report

Attention: Patch coverage is 0% with 8 lines in your changes are missing coverage. Please review.

Project coverage is 68.36%. Comparing base (c130105) to head (21c89d5).
Report is 2 commits behind head on main.

Files	Patch %	Lines
.../AppSyncRealTimeClient/AppSyncRealTimeClient.swift	0.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3734      +/-   ##
==========================================
- Coverage   68.51%   68.36%   -0.15%     
==========================================
  Files        1089     1089              
  Lines       37651    37658       +7     
==========================================
- Hits        25795    25744      -51     
- Misses      11856    11914      +58     

Flag	Coverage Δ
API_plugin_unit_test	68.61% <0.00%> (-0.37%)	⬇️
AWSPluginsCore	65.81% <ø> (ø)
Amplify	48.14% <ø> (-0.02%)	⬇️
Analytics_plugin_unit_test	84.52% <ø> (ø)
Auth_plugin_unit_test	79.34% <ø> (+0.01%)	⬆️
DataStore_plugin_unit_test	81.28% <ø> (-0.67%)	⬇️
Geo_plugin_unit_test	72.00% <ø> (ø)
Logging_plugin_unit_test	62.87% <ø> (ø)
Predictions_plugin_unit_test	37.32% <ø> (ø)
PushNotifications_plugin_unit_test	86.21% <ø> (ø)
Storage_plugin_unit_test	76.75% <ø> (ø)
unit_tests	68.36% <0.00%> (-0.15%)	⬇️

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