Protocol engine: Basic JSON protocol upload over HTTP

[sanni-t]

Overview

As an OT-2 user, I want to use an HTTP endpoint to send a single basic JSON protocol file to the robot.
Related to: #7808

Acceptance criteria

• a /protocol_upload http POST endpoint that is able to fetch the protocol file as form data
• the robot-server, upon receiving the request with the file, sends the file to Protocol runner which translates, extracts metadata and returns appropriate response* data to robot-server. The protocol runner does all things necessary to prepare the protocol in order to be run using P.E (covered in another ticket.)
• *Appropriate response to robot-server should include:
• Metadata
• Labware
• Handles to get:
  -- Labware definitions
  -- Protocol steps (Run log)
  -- Start protocol (or protocol session)

Out of scope for this ticket

• Features related to protocol simulation. Since this ticket relates to JSON protocols only, we should be able to implement the protocol upload w/o simulation.

[amitlissack]

Important to keep in mind that this functionality already exists in the robot-server.

[mcous]

This ticket was implemented by standing up a separate, feature-flagged router to avoid collision with any of the existing (working) HTTP protocol upload beta stuff.

All stuff about "metadata" in the original ticket was punted on in favor of a separate ticket about protocol simulation