[MLIR][OpenMP] Added MLIR translation support for use_device clauses

Added MLIR support for translating use_device_ptr and use_device_addr clauses for LLVMIR lowering.

  - use_device_ptr: The mapped variables marked with use_device_ptr are accessed through a copy of the base pointer mappers. The mapper is copied onto a new temporary pointer variable.
  - use_device_addr: The mapped variables marked with use_device_addr are accessed directly through the base pointer mappers.
  - If mapping information is not provided explicitly then default map_type of alloc/release is assumed and the map_size is set to 0.

Depends on D152554

Reviewed By: kiranchandramohan, raghavendhra

Differential Revision: https://reviews.llvm.org/D146648