[NFC][libclc] Replace redundant integer header files with clc, move relational.h into libspirv#17793

uditagarwal97 merged 1 commit intointel:syclintel/llvm:syclfrom

wenju-he:nfc-remove-libspirv-integer-headerwenju-he/llvm:nfc-remove-libspirv-integer-headerCopy head branch name to clipboard