Extend compute model attributes

This patch extends compute model attributes by
adding new fields to Instance element. Values are
populated by nova the collector, using the same
nova list call, but requires a more recent compute
API microversion.
A new config option was added to allow users to
enable or disable the extended attributes and it is
disable by default.
Configure prometheus-based jobs to run on newer version
of nova api (2.96) and enables the extended attributes
collection.

Implements: bp/extend-compute-model-attributes

Assisted-By: Cursor (claude-4-sonnet)

Change-Id: Ibf31105d780dce510a59fc74241fa04e28529ade
Signed-off-by: Douglas Viroel <viroel@gmail.com>

api-ref/source/parameters.yaml

@@ -552,6 +552,13 @@ server_disk:
   in: body
   required: true
   type: integer
+server_flavor_extra_specs:
+  description: |
+    The flavor extra specs of the server.
+  in: body
+  required: true
+  type: JSON
+  min_version: 1.6
 server_locked:
   description: |
     Whether the server is locked.
@@ -576,6 +583,13 @@ server_name:
   in: body
   required: true
   type: string
+server_pinned_az:
+  description: |
+    The pinned availability zone of the server.
+  in: body
+  required: true
+  type: string
+  min_version: 1.6
 server_project_id:
   description: |
     The project ID of the server.