Expose `WorkflowInboundCallInterceptor::init()` like in [Java SDK](https://github.com/temporalio/sdk-java/blob/a4c9e68254e4eae7e46ee0cd6c8f3e0d13dfe183/temporal-sdk/src/main/java/io/temporal/common/interceptors/WorkflowInboundCallsInterceptor.java#L182-L194)
