When the input and output data volume is particularly large, arbitrary downloading of external stored content leads to OOM

[shoy160]

Describe the bug
When the input and output data volume is particularly large, arbitrary downloading of external stored content leads to OOM.

Details
Conductor version: 3.13.3
Persistence implementation: Postgres, MySQL
Queue implementation: Postgres, MySQL
Lock: Redis
Workflow definition:
Task definition:
Event handler definition:

To Reproduce
Steps to reproduce the behavior:
java/com/netflix/conductor/core/dal/ExecutionDAOFacade.java getTaskModel(String taskId) 493

Why should inputstream be converted to String first and then serialized to Map format in
java/com/netflix/conductor/core/utils/ExternalPayloadStorageUtils.java downloadPayload(String path) 78

Expected behavior
Be cautious when downloading external storage content, and do not download it unless it is necessary.

Screenshots