[SYCL][CUDA] libclc Image Support for CUDA

[nyalloc]

Provides an implementation of image / sampling builtins required for CUDA backend image support.

Sampled image builtins are implemented with half support. Will not generate the half builtins until cl_khr_fp16 is set as supported, which requires #2003 to be merged.

[bader]

@StuartDAdams, could you take a look at build failure, please?

Intrinsic has incorrect argument type!
void (%opencl.image1d_wo_t addrspace(1)*, i32, i32, i32, i32, i32)* @llvm.nvvm.sust.b.1d.v4i32.clamp
in function _Z18__spirv_ImageWriteI14ocl_image1d_woiDv4_fEvT_T0_T1_

[nyalloc]

@StuartDAdams, could you take a look at build failure, please?

Intrinsic has incorrect argument type!
void (%opencl.image1d_wo_t addrspace(1)*, i32, i32, i32, i32, i32)* @llvm.nvvm.sust.b.1d.v4i32.clamp
in function _Z18__spirv_ImageWriteI14ocl_image1d_woiDv4_fEvT_T0_T1_

I've not been able to reproduce this locally yet. The branch has since been updated so if it fails to build on the CI again with this message I'll make sure to look into it as soon as possible.