AWS::Route53::HealthCheck HealthCheckConfig Disabled

## 1. Title
`AWS::Route53::HealthCheck HealthCheckConfig Disabled`

## 2. Scope of request
The existing HealthCheck resource doesn't allow setting the `Disabled` property, which is settable via the API

## 3. Expected behavior

If true, the `Disabled` property should disable the health check until it is false. The property should be optional, and false by default. No particular changes to the resource life-cycle that I can see.

## 4. Suggest specific test cases

Check that the health check is disabled when `Disabled` is true

## 5. Helpful Links to speed up research and evaluation

API Docs `Disabled` field: https://docs.aws.amazon.com/Route53/latest/APIReference/API_UpdateHealthCheck.html#Route53-UpdateHealthCheck-request-Disabled
Current CloudFormation `AWS::Route53::HealthCheck HealthCheckConfig` docs, lacking the `Disabled field`: https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-route53-healthcheck-healthcheckconfig.html
## 6. Category (required) - Will help with tagging and be easier to find by other users to +1

Use the categories as displayed in the AWS Management Console (simplified):

4. Networking & Content (VPC, Route53, API GW,...)

## 7. Any additional context (optional)

Found while implementing the L2 `HealthCheck` construct for the CDK ([#4413](https://github.com/aws/aws-cdk/pull/4413))

Start with the linked Route53 UpdateHealthCheck API documentation and the current CloudFormation HealthCheckConfig documentation, then compare the supported properties with the requested Disabled field. Add coverage for a true Disabled value and verify that the property remains optional with false as the default.

Written by the indexing model from the issue text.