[Box Events]: Add JWT support

### Integration Name

Box Events [box_events]

### Dataset Name

_No response_

### Integration Version

2.14.1

### Agent Version

9.1.2

### OS Version and Architecture

Kubernetes

### User Goal

I am trying to authenticate to the Box API using JSON Web Token (JWT)

### Existing Features

The integration currently only supports Client Credentials Grant (CCG) authentication.

### What did you see?

No error, JWT is not supported in the UI. The Grant Type field only supports one option currently.

### Anything else?

BOX JWT Authentication Method: https://developer.box.com/platform/authentication-methods/#json-web-token-jwt

jwt_auth.py in the Box SDK: https://github.com/box/box-python-sdk/blob/d604ea98012aed3c2d0212d1b40b71a52efb55ec/boxsdk/auth/jwt_auth.py#L238-L258