schemas: legacy: extract FanRedundancy schema

This allows to remove some properties from 'Aggregate' schema which are
no longer needed, since there is now a more specific schema to use.

Tested: Schema Validator Pass

Change-Id: Ib19e4d23fe85c4e960385e178b5ec3dd9e2a053e
Signed-off-by: Alexander Hansen <alexander.hansen@9elements.com>
diff --git a/schemas/global.json b/schemas/global.json
index 2bbc023..303e307 100644
--- a/schemas/global.json
+++ b/schemas/global.json
@@ -46,6 +46,9 @@
                             "$ref": "legacy.json#/$defs/CFMSensor"
                         },
                         {
+                            "$ref": "legacy.json#/$defs/FanRedundancy"
+                        },
+                        {
                             "$ref": "virtual_sensor.json#/$defs/VirtualSensor"
                         },
                         {