[mlir][spirv] Regenerate SPIRVBase.td from recent spec

* Some long names were added and script decided to change whitespaces in a lot of places
* `ImageOperand` was renamed to `ImageOperands` in spec
* Some *NV enums were renamed to *KHR (spec actually maintains both variants with same value, but script pulled only *KHR versions)

Reviewed By: antiagainst

Differential Revision: https://reviews.llvm.org/D113667