Add vyos_lldp and vyos_lldp_interface modules (#26753)

* Add vyos_lldp and vyos_lldp_interface modules

* Fix module docstring issue

* Fix bogus aggregate reference

* Add vyos_lldp integration tests

* Add vyos_lldp_interface integration tests

* Remove unused import for run_commands

* Add VyOS net_lldp integration tests

* Remove junos and netconf from net_lldp integration tests

* Add net_lldp_interface integration tests

* Correct CLI filtering tests for VyOS

* Fix pep8 issues

* Fix more pep8 issues

test/integration/targets/vyos_lldp/tests/cli/basic.yaml

@@ -0,0 +1,42 @@
+---
+- name: Make sure LLDP is not running before tests
+  vyos_config:
+    lines: delete service lldp
+
+- name: Enable LLDP service
+  vyos_lldp:
+    state: present
+  register: result
+
+- assert:
+    that:
+      - 'result.changed == true'
+      - '"set service lldp" in result.commands'
+
+- name: Enable LLDP service again (idempotent)
+  vyos_lldp:
+    state: present
+  register: result
+
+- assert:
+    that:
+      - 'result.changed == false'
+
+- name: Disable LLDP service
+  vyos_lldp:
+    state: absent
+  register: result
+
+- assert:
+    that:
+      - 'result.changed == true'
+      - '"delete service lldp" in result.commands'
+
+- name:
+  vyos_lldp:
+    state: absent
+  register: result
+
+- assert:
+    that:
+      - 'result.changed == false'