embed field value must be shorter than 1024, got 1216 [`308d176`](https://github.com/iree-org/iree/commit/308d1768ca2ad166cb7309a2de3842a269ae713e) [Encoding] Clarify IREE::Encoding interfaces. (#20037) Based on the learning from prototype, there are two kinds of encodings: 1. An encoding that is attached to the types, which is an encoding attribute. 2. An encoding that can query layouts from backends' perspective, which is an encoding layout resolver. The former implements SerializeableEncodingAttrInterface, and the latter implements the EncodingLayoutResolverAttrInterface. The revision moves the `cloneWithLayouts` method to the former interface, because it is used to update the former attributes. The revision introduces `isSerialized` interface method to SerializeableEncodingAttrInterface, implements the method for existing encoding attributes, and makes the SpecializeEncoding pass skip the update if it is already serialized. We don't use `isSpecialized` because specialization has larger scope. It does not only serialize the encodings, but also contains the analysis on affinities and executable duplication. The revision also fixes a bug when the HAL device does not have configuration. --------- Signed-off-by: hanhanW <[email protected]>