[OpenMP] Add Support for Mapping Names in Libomptarget RTL

Summary:
This patch adds basic support for priting the source location and names for the mapped variables. This patch does not support names for custom mappers. This is based on D89802.

Reviewers: jdoerfert

Differential Revision: https://reviews.llvm.org/D90172

GitOrigin-RevId: 5378c6a4bf9422db0e2d6232dc2dc43222d0ab6b
8 files changed