[Bug]: After upgrade to 4.0.0 the emails are not sent anymore

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Describe the bug

After the upgrade to 4.0.0 the emails alerts are not sent anymore during CodePipelines run. (STARTED, FAILED, SUCCEEDED)
I have checked the EventBridge rule and it's triggered successfully but the invocation to SNS fails.

### Expected Behavior

To send emails.

### Current Behavior

-

### Steps To Reproduce

_No response_

### Possible Solution

_No response_

### Additional Information/Context

_No response_

### ADF Version

4.0.0

### Contributing a fix?

- [X] Yes, I am working on a fix to resolve this issue

Start by tracing the EventBridge rule invocation to SNS during CodePipeline runs in ADF 4.0.0, focusing on the STARTED, FAILED, and SUCCEEDED alert paths. Compare the 4.0.0 behavior with the previous version and verify that SNS invocation succeeds and email alerts are sent for each event.

Written by the indexing model from the issue text.