ECOPROJECT-4321 | feat: change collected disk size tiers

This feature changes the disk size tiers stored in the inventory,
and decouples the complexity heuristics from those collected disk size tiers.

 - Disk size tiers change
    From: Easy (0-10TB) | Medium (10-20TB) | Hard (20-50TB) | White Glove (>50TB)
    To: 0-100GiB | 100-500GiB | 500GiB-1TiB | 1-2TiB | 2-5TiB | 5-10TiB | 10-20TiB | 20+TiB
 - Added DiskComplexityTier object to the inventory, with the tiers defined by the Jupyter notebook

Signed-off-by: Ami Malimovka <amalimov@redhat.com>

Author: amalimov

api/v1alpha1/agent/spec.gen.go

@@ -1738,6 +1738,13 @@ components:
           type: object
           additionalProperties:
             $ref: "#/components/schemas/diskSizeTierSummary"
+        diskComplexityTier:
+          type: object
+          description: >
+            Distribution of VMs across disk-complexity tiers used by the estimation engine
+            (0-10TiB, 10-20TiB, 20-50TiB, >50TiB).
+          additionalProperties:
+            $ref: '#/components/schemas/diskSizeTierSummary'
         diskTypes:
           type: object
           additionalProperties: