Lenovo integration test roles 1 (#44559)

* Integration test suit for cnos_facts, cnos_config, cnos_command, enos_facts, enos_config and enos_command.

* Update all_facts.yaml

* Update invalid_subset.yaml

* Update not_hardware.yaml

* Adding cnos_backup, cnos_bgp, cnos_conditional_command, cnos_condtional_template, cnos_ethernet, cnos_portchannel, cnos_rollback.

* Update README.md

* Adding the sample roles for cnos_save, cnos_show_run, cnos_template, cnos_vlag and cnos_vlan

test/integration/targets/cnos_command/tasks/cli.yaml

@@ -0,0 +1,15 @@
+---
+- name: collect all cli test cases
+  find:
+    paths: "{{ role_path }}/tests/cli"
+    patterns: "{{ testcase }}.yaml"
+  register: test_cases
+
+- name: set test_items
+  set_fact: test_items="{{ test_cases.files | map(attribute='path') | list }}"
+
+- name: run test case
+  include: "{{ test_case_to_run }}"
+  with_items: "{{ test_items }}"
+  loop_control:
+    loop_var: test_case_to_run