Closes #14311: Move L2VPN models from ipam to vpn (#14358)

* Move L2VPN and L2VPNTermination models from ipam to vpn

* Move L2VPN resources from ipam to vpn

* Extend migration to update content types

* Misc cleanup

netbox/vpn/choices.py

@@ -199,3 +199,56 @@ class DHGroupChoices(ChoiceSet):
         (GROUP_33, _('Group {n}').format(n=33)),
         (GROUP_34, _('Group {n}').format(n=34)),
     )
+
+
+#
+# L2VPN
+#
+
+class L2VPNTypeChoices(ChoiceSet):
+    TYPE_VPLS = 'vpls'
+    TYPE_VPWS = 'vpws'
+    TYPE_EPL = 'epl'
+    TYPE_EVPL = 'evpl'
+    TYPE_EPLAN = 'ep-lan'
+    TYPE_EVPLAN = 'evp-lan'
+    TYPE_EPTREE = 'ep-tree'
+    TYPE_EVPTREE = 'evp-tree'
+    TYPE_VXLAN = 'vxlan'
+    TYPE_VXLAN_EVPN = 'vxlan-evpn'
+    TYPE_MPLS_EVPN = 'mpls-evpn'
+    TYPE_PBB_EVPN = 'pbb-evpn'
+
+    CHOICES = (
+        ('VPLS', (
+            (TYPE_VPWS, 'VPWS'),
+            (TYPE_VPLS, 'VPLS'),
+        )),
+        ('VXLAN', (
+            (TYPE_VXLAN, 'VXLAN'),
+            (TYPE_VXLAN_EVPN, 'VXLAN-EVPN'),
+        )),
+        ('L2VPN E-VPN', (
+            (TYPE_MPLS_EVPN, 'MPLS EVPN'),
+            (TYPE_PBB_EVPN, 'PBB EVPN'),
+        )),
+        ('E-Line', (
+            (TYPE_EPL, 'EPL'),
+            (TYPE_EVPL, 'EVPL'),
+        )),
+        ('E-LAN', (
+            (TYPE_EPLAN, _('Ethernet Private LAN')),
+            (TYPE_EVPLAN, _('Ethernet Virtual Private LAN')),
+        )),
+        ('E-Tree', (
+            (TYPE_EPTREE, _('Ethernet Private Tree')),
+            (TYPE_EVPTREE, _('Ethernet Virtual Private Tree')),
+        )),
+    )
+
+    P2P = (
+        TYPE_VPWS,
+        TYPE_EPL,
+        TYPE_EPLAN,
+        TYPE_EPTREE
+    )