text: Title: Remove deprecated action HTTP APIs
  Body: This issue covers the fifth part of https://github.com/elastic/kibana/issues/90375. We should remove any deprecated action APIs when telemetry from https://github.com/elastic/kibana/issues/108716 shows usage is below 1% or deprecated for > 2.5 years (see: https://github.com/elastic/kibana/issues/90378). Don't forget docs.