Capture and rethrow json.parse and strigify errors from @json directive

[varadarajan-tw]

Recently noticed a spike in internal errors for actions-amplitude.

Testing

Include any additional information about the testing you have completed to ensure your changes behave as expected. For a speedy review, please check any of the tasks you completed below during your testing.

• [ ] Added unit tests for new functionality
• [ ] Tested end-to-end using the local server
• [ ] [Segmenters] Tested in the staging environment