…round

Part of: https://linear.app/customerio/issue/MBL-364/[bug]-push-notifications-not-showing-while-app-in-foreground-on-ios

The CIO SDK forwards push events to 3rd party SDKs. Some 3rd party SDKs send the push event back to the CIO SDK, potentially causing infinite loops. The SDK is designed to handle this. Previously, the responsibility of calling the completionHandler was on the 3rd party SDKs. However, some 3rd party SDKs delegate this responsibility back to us (See: https://linear.app/customerio/issue/MBL-364/[bug]-push-notifications-not-showing-while-app-in-foreground-on-ios#comment-3ae0db4e). This commit addresses that scenario.

Testing:
* Modified integration tests to cover this scenario.
* Added tests for both `onPushAction` and `shouldDisplayPushAppInForeground` delegate functions.
* Ran regression QA tests on iOS, RN, and Flutter.

Notes for reviewers:
- Limited comments in `iOSPushEventListener` intentionally. Test functions and comments in AutomaticPushClickIntegrationTest explain the use cases and reproducing steps.

… dont

I cherry-picked the commit from the code targeting v2 branch. In v2, the logger instance is optional.