Retrieve/Submit config to new endpoints

[mssalvatore]

Refactor

Component(s) to be refactored

• UI

Explanation

New endpoints have been added in #2000 to allow configuration to be retrieved and modified. Modify the UI to use these endpoints when retrieving a config from the island or submitting a modified one.

Tasks

• Define a new JSON schema in the UI layer (0d) @ilija-lazoroski
  • Don't forget to define "unsafe options" in the schema
  • Make the new configuration UI look pretty
• Remove the old schema (0d) - @shreyamalviya
  • Modify ATT&CK report to use the marshmallow schema or AgentConfiguration object
• Modify the UI to use the new /api/agent-configuration endpoints (0d) - @VakarisZ
  • export/import
  • reset/submit
• Remove any disused configuration endpoints (0d)