API v2 delete event

[c8y3]

Implement endpoint DELETE /api/v2/cases/{case_identifier}/events/{identifier} to delete an evidence.

• return 204 in case of success
• create method in the business layer
• GET /api/v2/cases/{case_identifier}/events/{identifier} returns 404, after delete
• return an empty body in case of success
• return 404 when the case is not found
• return 404 when the event is not found
• return 403 when user is denied permission to case
• returns 400 when case_identifier is not the identifier of the case of the event
• deprecate POST /case/timeline/events/delete/{event_id}
• openapi: document endpoint
• openapi: deprecate POST /case/timeline/events/delete/{event_id}

[c8y3]

• Fix: DELETE /api/v2/cases/{case_identifier}/evidences/{identifier} evidence when user has no permission to access case should not delete evidence
• removed the adherence of the event business layer with marshmallow and the schema (moved up in the API)
• deprecated create and update events preload hooks
• openapi: removed some lint warnings
• Removed endpoint GET /manage/server/check-updates/modal
• Removed endpoint GET /manage/server/make-update
• Fixed all remaining occurrences and activate ruff rule RET506
• Moved some methods from app.util closer to their use in namespace app.schema.utils
• Created class Events so as to avoid to duplicate and recreate the EventSchema several times in the code (and at runtime)