Consider ID list in Delete all events endpoint

[roxblnfk]

In the case when a user locks an event, a list of event identifiers for deletion is sent to the endpoint for clearing all events. This needs to be taken into account.
To do this, we need to consider passing additional parameters from the request payload.

• When calling RPC via a websocket, additional parameters are defined in the data field.
  Considers id list in Delete events action #37
• When accessing via HTTP, parameters are passed in the request body, packed in JSON.
  Include HTTP method DELETE to a body parsing list; parse arguments on HTTP calls from the Frontend #38