[RRIO]: Add retryAfter field to UserCodeQuotaException

[damondouglas]

What needs to happen?

Some HTTP-based Web API servers will respond with a Retry-After header. To allow developer Caller implementations to signal this information back to Call's DoFn, add a @Nullable Duration retryAfter field to UserCodeQuotaException. It would be the responsibility of a developer Caller implementation to populate this field. Not all HTTP-based Web API servers will provide this header and not all Web APIs are HTTP-based.

See https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Retry-After for more details.

[github-actions]

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[github-actions]

This issue has been closed due to lack of activity. If you think that is incorrect, you can reopen the issue at any time.