AWS::CloudFormation::ResourceVersion - Region-Allow private resource type to be available globally

## 1. Title

#### AWS::CloudFormation::ResourceVersion-Region-Allow private resource type to be available globally

## 2. Scope of request
It would be nice to have the option to register a private resource provider for a particular AWS account and to **all regions**. This applies to AWS API itself so that we can have the same behavior across AWS CLI, CloudFormation template (when available), etc.

~~I would even argue that Resource Types should be global by default just like IAM resources.~~

## 3. Expected behavior
In Create/Update, we should have a property to set that resource type globally available.

## 4. Suggest specific test cases
One could try to use the following hypothetical template:

```yaml
Type: AWS::CloudFormation::ResourceVersion
Properties:
ExecutionRoleArn: ...
LoggingConfig: ...
SchemaHandlerPackage: ...
TypeName: Organization::Service::Resource
Visibility: PRIVATE # Even if visibility could be set to public/private in the future
Global: true
```

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

#### PR on GitHub: https://github.com/aws-cloudformation/aws-cloudformation-resource-providers-cloudformation/pull/4

## 6. Category

Management (CloudTrail, Config...)

Start by reviewing the linked PR and the AWS::CloudFormation::ResourceVersion Create/Update behavior described in the issue. Use the hypothetical YAML template as the scenario to evaluate; done means a private resource provider can be registered for an account and made available across all regions.

Written by the indexing model from the issue text.