Add support for extra format options in OpenAPI Sampler

[derevnjuk]

In accordance with the JSON Schema Validation vocabulary, data types may have an optional modifier property known as format. This spec defines a wide range of values, such as duration and time. To ensure compliance with the validation specification, it is necessary to include support for all of these values.

For example, if you have the following schema that needs to generate a sample of duration in ISO 8601:

sample({
  type: 'string',
  format: 'duration',
});
// P3D

or just time:

sample({
  type: 'string',
  format: 'time',
});
// '20:20:39+00:00'