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##### SUMMARY
<!--- Describe the new feature/improvement briefly below -->
Add support for `MaxInstanceLifetime` option to AWS ec2_asg module.
AWS feature introduction link: https://aws.amazon.com/about-aws/whats-new/2019/11/amazon-ec2-auto-scaling-supports-max-instance-lifetime/

##### ISSUE TYPE
- Feature Idea

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
ec2_asg

##### ADDITIONAL INFORMATION
<!--- Describe how the feature would be used, why it is needed and what it would solve -->
Usage example:
<!--- Paste example playbooks or commands between quotes below -->
```yaml
- ec2_asg:
    name: myasg
    region: us-east-1
    launch_config_name: my_new_lc
    min_size: 1
    max_size: 5
    desired_capacity: 3
    max_instance_lifetime: 604800  # seconds
```

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launch_template_name:
        description:
          - The name of the launch template. Only one of I(launch_template_name) or I(launch_template_id) is required.
        type: str
      launch_template_id:
        description:
          - The id of the launch template. Only one of I(launch_template_name) or I(launch_template_id) is required.
        type: str
    type: dict
    version_added: "2.8"
  min_size:
    description:
      - Minimum number of instances in group, if unspecified then the current group value will be used.
    type: int
  max_size:
    description:
      - Maximum number of instances in group, if unspecified then the current group value will be used.
    type: int
  mixed_instances_policy:
    description:
      - A mixed instance policy to use for the ASG.
      - Only used when the ASG is configured to use a Launch Template (I(launch_template)).
      - 'See also U(https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-autoscaling-autoscalinggroup-mixedinstancespolicy.html)'
    required: false
    version_added: "2.10"
    suboptions:
      instance_types:
        description:
          - A list of instance_types.
        type: list