feat: Add `response_completion_timeout` support @jwadolowski (#159)
## what- Add support for
response_completion_timeoutargument (announced by AWS in July 2025 and implemented in the 6.13.0 version of the AWS provider) - Bump the minimum provider version to
>= 6.13.0(it was incorrect anyway, e.g.grpc_configblock needs 5.83.0 or newer)
why
Allows configuring response_completion_timeout for CloudFront origins.