Add Semantic check for Flang OpenMP 4.5 - 2.15.3.2 and 2.15.3.3 shared and private clause
Semantic check to restrict the appearance of a variable that is part of another variable
(as an array or structure element) in a PRIVATE or SHARED clause.
Test Cases:
omp-parallel-private01.f90
omp-parallel-private02.f90
omp-parallel-private03.f90
omp-parallel-private04.f90
omp-parallel-shared01.f90
omp-parallel-shared02.f90
omp-parallel-shared03.f90
omp-parallel-shared04.f90
Reviewed by: Kiran Chandramohan @kiranchandramohan , Valentin Clement @clementval
Differential Revision: https://reviews.llvm.org/D89395