[AWS::InspectorV2::Filter] - [Coverage] - Add EcrImageInUseCount to FitlerCriteria

### Name of the resource

AWS::InspectorV2::Filter

### Resource name

_No response_

### Description

The `AWS::InspectorV2::Filter` is missing the `EcrImageInUseCount` attribute in its `FilterCriteria` attribute. `EcrImageInUseCount` is available through the API: https://docs.aws.amazon.com/inspector/v2/APIReference/API_FilterCriteria.html

Would it be possible to add it?

### Other Details

_No response_

Start with the AWS::InspectorV2::Filter resource and compare its FilterCriteria coverage with the linked Inspector V2 API reference. The work is complete when EcrImageInUseCount is represented as an available FilterCriteria attribute, matching the API field.

Written by the indexing model from the issue text.