[SYCL] Move GroupNonUniform SPIR-V built-in declarations to clang SPIRVBuiltins.td#17627

uditagarwal97 merged 2 commits intointel:syclintel/llvm:syclfrom

wenju-he:move-GroupNonUniform-to-SPIRVBuiltins.tdwenju-he/llvm:move-GroupNonUniform-to-SPIRVBuiltins.tdCopy head branch name to clipboard