Constant OPENVINO_TOSA_FP8_TARGET 

pub const OPENVINO_TOSA_FP8_TARGET: Target;

TOSA FP8 target (ADR 0009), mirroring VULKAN_TOSA_FP8_TARGET exactly.

TOSA gates FP8 legality on the FP8E4M3 / FP8E5M2 extensions rather than on the base floating-point profile, so the FP8 envelope is a distinct target rather than a dtype narrowing of OPENVINO_TOSA_TARGET – unlike FP16, which shares the float target identity.