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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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if max_size is None:
            max_size = as_group['MaxSize']
        if desired_capacity is None:
            desired_capacity = as_group['DesiredCapacity']
        ag = dict(
            AutoScalingGroupName=group_name,
            MinSize=min_size,
            MaxSize=max_size,
            DesiredCapacity=desired_capacity,
            HealthCheckGracePeriod=health_check_period,
            HealthCheckType=health_check_type,
            DefaultCooldown=default_cooldown,
            TerminationPolicies=termination_policies)
        
        launch_object = get_launch_object(connection, ec2_connection)
        if 'LaunchConfigurationName' in launch_object:
            ag['LaunchConfigurationName'] = launch_object['LaunchConfigurationName']
        elif 'LaunchTemplate' in launch_object:
            if 'MixedInstancesPolicy' in launch_object:
                ag['MixedInstancesPolicy'] = launch_object['MixedInstancesPolicy']
            else:
                ag['LaunchTemplate'] = launch_object['LaunchTemplate']
        else:
            try:
                ag['LaunchConfigurationName'] = as_group['LaunchConfigurationName']
            except Exception:
                launch_template = as_group['LaunchTemplate']
                
                ag['LaunchTemplate'] = {"LaunchTemplateId": launch_template['LaunchTemplateId'], "Version": launch_template['Version']}
        if availability_zones: