New GET, POST, and DELETE video on demand and GET hubs APIs to manage videos and actions. New qr_code_url response field in Registrants API and Tickets APIs.

New video on demand and hubs APIs and new response field


## Added

- New **Video On-Demand** APIs:
	- `DELETE /v2/zoom_events/hubs/{hubId}/vod_channels/{channelId}/videos/{videoId}`
	- `GET /v2/zoom_events/hubs/{hubId}/vod_channels/{channelId}/videos`
	- `POST /v2/zoom_events/hubs/{hubId}/vod_channels/{channelId}/videos`
- New **Hubs** API:
	- `GET /v2/zoom_events/hubs/{hubId}/videos`

## Enhancements

- New `qr_code_url` response field in the following  **Registrants** API:
	- `GET /v2/zoom_events/events/{eventId}/registrants`
- New `qr_code_url` response field in the following  **Tickets** APIs:
	- `GET /v2/zoom_events/events/{eventId}/tickets/{ticketId}`
	- `POST /v2/zoom_events/events/{eventId}/tickets`
	- `GET /v2/zoom_events/events/{eventId}/tickets`
