Improve texture loads and stores on CUDA (#8644)

- fix handling layer and mip level
- add support for 1D layered textures
- reduce code by using macros
- assert when trying to emit unsupported intrinsics

There is a new set of unit tests in slang-rhi for exhaustive testing of
shader loads/stores on textures. These fixes allow to enable most of
these tests. Formatted loads/stores on surfaces are not supported in PTX
ISA, so this would require codegen for the conversion which in theory
should be possible but not as part of the CUDA prelude.

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