Handling Custom::<CustomName> when synthesizing custom resources

[sandeepklr]

Notes

Handling Custom:: when synthesizing custom resources. Originally thought about converting all Custom:: resource types to AWS::CloudFormation::CustomResource in resources/translates_resources(), but given immutability turned out to be a more involved option.

Testing

Output:

const resourceType = new cloudformation.CfnCustomResource(this, 'Name', {
         serviceToken: FunctionName.attrArn
});