Automatic polling support for Terraform providers

Terraform providers generated with Speakeasy now include automatic polling support for API operations that perform background processing, eliminating the need for manual waiter logic when resources need time to reach a desired state. This feature addresses the common pattern of long-running requests in infrastructure APIs, where operations such as creating database instances or spinning up compute resources are performed asynchronously. The polling support utilizes the x-speakeasy-polling OpenAPI extension, which defines success and failure criteria, as well as timing configurations, for these operations, allowing Terraform resources to automatically handle state transitions during the resource lifecycle, including create, update, delete, and read/refresh phases. This integration simplifies Terraform provider development by removing the need for custom polling logic, ensuring consistent behavior across resources, and providing robust error handling and a seamless user experience.