(cognito): (WebAuthnFactorConfiguration missing from L2 constructs)

### Describe the feature

WebAuthnFactorConfiguration is an available CFN property that isn't implemented in the L2 Construct

### Use Case

Being able to set basic CFN properties with L2 props is kinda nice.

### Proposed Solution

_No response_

### Other Information

_No response_

### Acknowledgements

- [x] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

### AWS CDK Library version (aws-cdk-lib)

latest

### AWS CDK CLI version

N/A

### Environment details (OS name and version, etc.)

N/A

Start by locating the Cognito L2 construct and its props, then compare them with the available CloudFormation WebAuthnFactorConfiguration property. Check the construct's existing tests for how similar L2 properties are exposed and covered. Done means the property can be set through the L2 props and the relevant tests pass.

Written by the indexing model from the issue text.