[OpenMP] Add support for mapping names in mapper API

Summary:
The custom mapper API did not previously support the mapping names added previously. This means they were not present if a user requested debugging information while using the mapper functions. This adds basic support for passing the mapped names to the runtime library.

Reviewers: jdoerfert

Differential Revision: https://reviews.llvm.org/D94806

GitOrigin-RevId: e4eaf9d82064901ff028332d1644eddafac73f69
4 files changed