nxos_vlan tweaks (#23194)

* Remove commented code

Remove a lot of unnecessary output

* Tests

* Sort vlan ids _after_ running set operations, so order is not lost

test/units/modules/network/nxos/fixtures/nxos_vlan/show_vlan.txt

@@ -0,0 +1,18 @@
+{
+  "TABLE_vlanbrief": {
+    "ROW_vlanbrief": {
+      "vlanshowbr-vlanid": 16777216, 
+      "vlanshowbr-vlanid-utf": 1, 
+      "vlanshowbr-vlanname": "default", 
+      "vlanshowbr-vlanstate": "active", 
+      "vlanshowbr-shutstate": "noshutdown"
+    }
+  }, 
+  "TABLE_mtuinfo": {
+    "ROW_mtuinfo": {
+      "vlanshowinfo-vlanid": 1, 
+      "vlanshowinfo-media-type": "enet", 
+      "vlanshowinfo-vlanmode": "ce-vlan"
+    }
+  }
+}

test/units/modules/network/nxos/fixtures/nxos_vlan/show_vlan_id_1.txt

@@ -0,0 +1,20 @@
+{
+  "TABLE_vlanbriefid": {
+    "ROW_vlanbriefid": {
+      "vlanshowbr-vlanid": 16777216, 
+      "vlanshowbr-vlanid-utf": 1, 
+      "vlanshowbr-vlanname": "default", 
+      "vlanshowbr-vlanstate": "active", 
+      "vlanshowbr-shutstate": "noshutdown"
+    }
+  }, 
+  "TABLE_mtuinfoid": {
+    "ROW_mtuinfoid": {
+      "vlanshowinfo-vlanid": 1, 
+      "vlanshowinfo-media-type": "enet", 
+      "vlanshowinfo-vlanmode": "ce-vlan"
+    }
+  }, 
+  "vlanshowrspan-vlantype": "notrspan", 
+  "is-vtp-manageable": "enabled"
+}