WS-717: Modify schema for State Machine rework

Changes

• Added call to populate capability state rework tables (previously missing)
• Schema additions for State Machine rework:
  1. Table capabilities:
     • New column start_state, varchar, default = "Start"
  2. Table capability_executions:
     • New column start_state, varchar, default = "Start"
     • New column queue_state, varchar, default = "NotQueued"
  3. Table capability_states:
     • For all capabilities, new state "Queued"
  4. Table capability_state_transitions:
     • For all capabilities, new transition "Start" -(capability-submitted)-> "Queued"
     • For all capabilities, new transition "Queued" -(workflow-executing)-> "Executing"
• Corresponding Python schema changes
• New enum QueueState with states: NotQueued, Queued, and Running
• Updated queueing system to use new QueueStates
• Updated CapabilityExecution back-end __json__ and front-end model with new queue_state column

No enabled tests were harmed in the making of this MR (somehow)

Completes WS-725 and WS-730