[Flang][OpenMP] Do not consider procedure names for data-sharing

An incorrect error was issued for procedure names occuring in OpenMP
regions with default clause set to NONE. Fix is to ignore all cases
where names are various kinds of procedures.

Fixes issue https://github.com/flang-compiler/f18-llvm-project/issues/1350

Reviewed By: peixin

Differential Revision: https://reviews.llvm.org/D143384