This PR fixes generation of OpConstantFunctionPointerINTEL instruction
for the SPIR-V extension SPV_INTEL_function_pointers. Result type of
OpConstantFunctionPointerINTEL must be OpTypePointer with Storage Class
operand equal to CodeSectionINTEL.
See also https://github.com/llvm/llvm-project/pull/116636
CC: @MrSidims