Add SPIRV Image Type according to the spec described here :

https://www.khronos.org/registry/spir-v/specs/1.0/SPIRV.html#OpTypeImage.

Add new enums to describe Image dimensionality, Image Depth, Arrayed
information, Sampling, Sampler User information, and Image format.
Doesn's support the Optional Access qualifier at this stage

Fix Enum generator for tblgen to add "_" at the beginning if the enum
starts with a number.

PiperOrigin-RevId: 254091423