Update TA training to support multiple types

• Move "Manage Programme" to Header + Remove TA Training Page
• Add TA Training Import to "Manage Programme"
• Remove Student Creation of Training Requests
• Add Coordinator Definition of Trainings
  • Add Training Types
  • Remove Training Types
• Add Multiple Training Types + Dates => ?
• Change Student Profile Page to Show Diff. Types of Completed Training
• Change TA Training Imports to Support Multiple Types
• Change TA Training Imports to Always Overwrite (ie. Remove Conflicts Stage)
• Migrate: Everyone who has completed the old TA training gets "starter kit" + "labs" TA training