[cloud][aws] Add metrics_collection options to ec2_asg module (#35180)

* Added metrics_collection management to ec2_asg module to switch ASG metrics on and off.

* Fixed typo in documentation of ec2_asg module

* Removed extra blank line in ec2_asg.py

* Docs fixes for ec2_asg module

* Added integration test for ec2_asg metrics flag

* Trying different syntax for ec2_asg test

test/integration/targets/ec2_asg/tasks/main.yml

@@ -208,6 +208,31 @@
         that:
         - "output.viable_instances == 0"
 
+    - name: kill asg
+      ec2_asg:
+        name: "{{ resource_prefix }}-asg"
+        state: absent
+        <<: *aws_connection_info
+      async: 300
+    # ============================================================
+
+    - name: create asg with asg metrics enabled
+      ec2_asg:
+        name: "{{ resource_prefix }}-asg"
+        metrics_collection: true
+        launch_config_name: "{{ resource_prefix }}-lc"
+        desired_capacity: 0
+        min_size: 0
+        max_size: 0
+        vpc_zone_identifier: "{{ testing_subnet.subnet.id }}"
+        state: present
+        <<: *aws_connection_info
+      register: output
+
+    - assert:
+        that:
+        - "'Group' in output.metrics_collection.0.Metric"
+
     - name: kill asg
       ec2_asg:
         name: "{{ resource_prefix }}-asg"