Reverts "[ci] Remove in_app_purchase_storekit from Xcode analyzer exclusion list (#9429)"

[auto-submit]

Reverts: #9429

Initiated by: jmagman

Reason for reverting: This somehow passed in presubmit but failed in postsubmit: https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8710980990085669745/+/u/Run_package_tests/xcode_analyze_deprecation/stdout

Original PR Author: jmagman

Reviewed By: {LouiseHsu}

This change reverts the following previous change:
StoreKit2 is now the default and flutter/flutter#116383 is closed. Let's remove it from the deprecation exclusion list to ensure we get new deprecation warnings.

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