Integration Tests only: nxos_udld, nxos_udld_interface, nxos_vxlan_vtep_vni (#29143)

* it cases for vxlan_vtep_vni, udld

* platform specific testing

* fix vxlan_vtep for n7k

* fix udld_intf setup

* skip udld tests on titanium n7k

* remove hardcoding

* fix udld tests for titanium

test/integration/targets/nxos_udld_interface/tests/common/sanity.yaml

@@ -0,0 +1,74 @@
+---
+- debug: msg="START TRANSPORT:{{ connection.transport }} nxos_udld_interface sanity test"
+
+- set_fact: udld_run="true"
+- set_fact: udld_run="false"
+  when: ((platform | search('N9K-F')) and (imagetag and (imagetag | version_compare('F3', 'lt'))))
+- set_fact: udld_run="false"
+  when: titanium
+
+# Select interface for test
+- set_fact: intname="{{ nxos_int1 }}"
+
+- block:
+  - name: "Enable feature udld"
+    nxos_feature: 
+      feature: udld
+      state: enabled
+      provider: "{{ connection }}"
+
+  - name: "put the interface into default state"
+    nxos_config: 
+      commands:
+        - "default interface {{intname}}"
+      provider: "{{ connection }}"
+      match: none
+
+  - name: ensure interface is configured to be in aggressive mode
+    nxos_udld_interface: &conf1
+      interface: "{{ intname }}"
+      mode: aggressive
+      state: present
+      provider: "{{ connection }}"
+    register: result
+
+  - assert: &true
+      that:
+        - "result.changed == true"
+
+  - name: "Conf1 Idempotence"
+    nxos_udld_interface: *conf1
+    register: result
+
+  - assert: &false
+      that:
+        - "result.changed == false"
+
+  - name: ensure interface has mode enabled
+    nxos_udld_interface: &conf2
+      interface: "{{ intname }}"
+      mode: enabled
+      state: present
+      provider: "{{ connection }}"
+    register: result
+
+  - assert: *true
+
+  - name: Remove the config
+    nxos_udld_interface: &remove
+      interface: "{{ intname }}"
+      mode: enabled
+      state: absent
+      provider: "{{ connection }}"
+
+  when: udld_run
+
+  always:
+  - name: "Disable udld"
+    nxos_feature: 
+      feature: udld
+      state: disabled
+      provider: "{{ connection }}"
+    ignore_errors: yes
+
+- debug: msg="END TRANSPORT:{{ connection.transport }} nxos_udld_interface sanity test"