Add GS108PEv3 (#1230)

* Add GS180PEv3

I did something wrong with the previous pull request, so I created a new one for this. Appended with additional info.
No airflow as it's a passive switch. No u_height as it's a desktop 8 port poe switch which is not likely to be mounted in a rack.

* Update GS108PEv3.yaml

Fixed slug
Added passive airflow per comment from author
Fixed u_height
Fixed comment
Removed un-needed definitions

---------

Co-authored-by: Daniel W. Anner <daniel.anner@danstechsupport.com>

device-types/Netgear/GS108PEv3.yaml

@@ -0,0 +1,40 @@
+---
+manufacturer: Netgear
+model: GS108PEv3
+slug: netgear-gs108pev3
+part_number: GS108PEv3
+u_height: 0
+airflow: passive
+weight: 0.54
+weight_unit: kg
+is_full_depth: false
+comments: '[Product Page](https://www.netgear.com/support/product/gs108pev3#docs)'
+power-ports:
+  - name: PSU
+    type: dc-terminal
+    maximum_draw: 60
+interfaces:
+  - name: GigabitEthernet/1
+    type: 1000base-t
+    poe_mode: pse
+    poe_type: type1-ieee802.3af
+  - name: GigabitEthernet/2
+    type: 1000base-t
+    poe_mode: pse
+    poe_type: type1-ieee802.3af
+  - name: GigabitEthernet/3
+    type: 1000base-t
+    poe_mode: pse
+    poe_type: type1-ieee802.3af
+  - name: GigabitEthernet/4
+    type: 1000base-t
+    poe_mode: pse
+    poe_type: type1-ieee802.3af
+  - name: GigabitEthernet/5
+    type: 1000base-t
+  - name: GigabitEthernet/6
+    type: 1000base-t
+  - name: GigabitEthernet/7
+    type: 1000base-t
+  - name: GigabitEthernet/8
+    type: 1000base-t