nxos_vlan purge (#38202)

Signed-off-by: Trishna Guha <trishnaguha17@gmail.com>

test/integration/targets/nxos_vlan/tests/common/agg.yaml

@@ -63,6 +63,27 @@
     that:
       - 'result.changed == false'
 
+- name: purge
+  nxos_vlan: &purge
+    vlan_id: 1
+    purge: yes
+    provider: "{{ connection }}"
+  register: result
+
+- assert:
+    that:
+      - 'result.changed == true'
+      - '"no vlan 102" in result.commands'
+      - '"no vlan 103" in result.commands'
+
+- name: purge - Idempotence
+  nxos_vlan: *purge
+  register: result
+
+- assert:
+    that:
+      - 'result.changed == false'
+
 - name: teardown
   nxos_config: *rm
   ignore_errors: yes