fix(route53): add RoutingControlArn to HealthCheck patch (#18645)

The Route53 HealthCheckConfig structure is modeled in the CloudFormation spec as
a JSON blob, but it was previously modeled as an explicit structure (see
structure, as it's not updated with the Route53 spec. This adds the missing
RoutingControlArn to the structure.

fixes #18570


----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: njlynch

Diff for: packages/@aws-cdk/cfnspec/spec-source/specification/000_cfn/660_Route53_HealthCheck_patch.json

@@ -118,6 +118,12 @@
                 "Required": false,
                 "UpdateType": "Mutable"
               },
+              "RoutingControlArn": {
+                "Documentation": "http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-route53-healthcheck-healthcheckconfig.html#cfn-route53-healthcheck-healthcheckconfig-routingcontrolarn",
+                "PrimitiveType": "String",
+                "Required": false,
+                "UpdateType": "Mutable"
+              },
               "SearchString": {
                 "Documentation": "http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-route53-healthcheck-healthcheckconfig.html#cfn-route53-healthcheck-healthcheckconfig-searchstring",
                 "PrimitiveType": "String",
@@ -154,4 +160,4 @@
       }
     }
   }
-}
+}