additionalProperties needs to be enforced to false

At [several](https://github.com/aws-cloudformation/aws-cloudformation-resource-schema/blob/master/src/main/resources/schema/provider.definition.schema.v1.json#L167-L171) [points](https://github.com/aws-cloudformation/aws-cloudformation-resource-schema/blob/master/src/main/resources/schema/provider.definition.schema.v1.json#L256-L260) in the schema, there are JSON schema blocks that force additionalProperties to be false:

https://github.com/aws-cloudformation/aws-cloudformation-resource-schema/blob/6db79a6253e65ee97c55aacfdb7c67f408d2d573/src/main/resources/schema/provider.definition.schema.v1.json#L167-L171

However at no point in the schema is the field marked as required so that this validation applies. This poses a problem since [the default value is true](https://json-schema.org/understanding-json-schema/reference/object.html).

We need to make a change so this field has to be present. Adding it to the `required` arrays where necessary is one possible avenue.

Open src/main/resources/schema/provider.definition.schema.v1.json and inspect the linked schema sections around lines 167-171 and 256-260, then trace the related required arrays. Confirm that every relevant additionalProperties: false declaration is required by the schema, and validate the schema behavior with the repository's available checks.

Written by the indexing model from the issue text.