fix(interconnect): requested_link_count is in-place mutable (#15365)

Co-authored-by: dkarwowski <[email protected]>

Author: dkarwowski

mmv1/products/compute/Interconnect.yaml

@@ -105,7 +105,6 @@ properties:
     description: |
       Target number of physical links in the link bundle, as requested by the customer.
     required: true
-    immutable: true
   - name: 'interconnectType'
     type: Enum
     description: |