added HPE StoreOnce 5260, based on a DL385 Gen10 chassis (#3144)

* added HPE StoreOnce 5260, based on a DL385 Gen10 chassis

* Update StoreOnce-5260.yaml

Added minimal weight information

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Co-authored-by: Harry <Harry@cadby.co.uk>

device-types/HPE/StoreOnce-5260.yaml

@@ -0,0 +1,30 @@
+---
+manufacturer: HPE
+model: StoreOnce 5260
+slug: hpe-storeonce-5260
+u_height: 2
+is_full_depth: true
+airflow: front-to-rear
+part_number: R6U03A
+comments: '[HPE StoreOnce QuickSpecs](https://www.hpe.com/psnow/doc/c04328820.pdf)'
+weight: 15.1
+weight_unit: kg
+module-bays:
+  - name: OCP3
+    position: OCP3
+  - name: PCIe1
+    position: PCIe1
+  - name: PCIe2
+    position: PCIe2
+  - name: PCIe4
+    position: PCIe4
+  - name: PCIe5
+    position: PCIe5
+  - name: PSU1
+    position: PSU1
+  - name: PSU2
+    position: PSU2
+interfaces:
+  - name: iLO
+    type: 1000base-t
+    mgmt_only: true