quota: add device block to the quota init command (#23881)

command/quota_init.go

@@ -123,6 +123,10 @@ limit {
     cpu        = 2500
     memory     = 1000
     memory_max = 1000
+    device {
+      name  = "nvidia/gpu/1080ti",
+      count = 1,
+    }
   }
   variables_limit = 1000
 }
@@ -140,6 +144,10 @@ var defaultJsonQuotaSpec = strings.TrimSpace(`
 				"CPU": 2500,
 				"MemoryMB": 1000,
 				"MemoryMaxMB": 1000
+				"Device": {
+					"Name": "nvidia/gpu/1080ti",
+					"Count": 1
+				},
 			},
 			"VariablesLimit": 1000
 		}