[AWS::ApplicationAutoScaling::ScalingPolicy] - [Coverage] - Drift detection support

### Name of the resource

AWS::ApplicationAutoScaling::ScalingPolicy

### Resource name

_No response_

### Description

Currently, drift detection is not supported for the ApplicationAutoScaling ScalingPolicy resource in CloudFormation as per the Resource type support [doc](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/resource-import-supported-resources.html).

This Feature Request is to add drift detection support for [AWS::ApplicationAutoScaling::ScalingPolicy](https://docs.aws.amazon.com/AWSCloudFormation/latest/TemplateReference/aws-resource-applicationautoscaling-scalingpolicy.html).

### Other Details

_No response_

Start by reading the linked CloudFormation resource type support documentation and the AWS::ApplicationAutoScaling::ScalingPolicy template reference. Determine the requirements and project entry point for adding drift detection support; done means this resource is listed as supporting drift detection and the behavior is covered by the relevant validation or integration checks.

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