[Flang][MLIR][OpenMP] Update OMPEarlyOutlining to support Bounds, MapEntry and...

[Flang][MLIR][OpenMP] Update OMPEarlyOutlining to support Bounds, MapEntry and declare target globals

This patch is a required change for the device side IR to
maintain apporpiate links for declare target variables to
their global variables for later lowering.

It is also a requirement to clone over map bounds and
entry operations to maintain the correct information for
later lowering of the IR.

It simply tries to clone over the relevant information
maintaining the appropriate links they would have
maintained prior to the pass, rather than redirecting
them to new function arguments which causes a
loss of information in the case of Declare Target
and map information.

Depends on D158734

reviewers: TIFitis, razvanlupusoru

Differential Revision: https://reviews.llvm.org/D158735