Refactor OpenMPTarget backend (#5726)

* OpenMPTarget: Refactored the current code into individual files that implement individual constructs.

* OpenMPTarget: Block unit tests that fail with llvm/16.

* OpenMPTarget: Adding the ParallelScan for hierarchical parallelism in a different file.

* OpenMPTarget: Add ParallelScan for TeamPolicy in a separate file.

* OpenMPTarget: Edits to include file names where needed.

* OpenMPTarget: Removed the diff_files file.

* OpenMPTarget: Rolled back the changes in the CMakeList for unit test.

* OpenMPTarget: diff_files reverted as of the develop branch. Moved Kokkos_OpenMPTargetSpace file into OpenMPTarget dir.

* OpenMPTarget: Fixing diff_files.

* OpenMPTarget: Delete empty lines at the top before license information.

* OpenMPTarget: Adding the OpenMPTargetSpace file which was removed from the dir above.

* OpenMPTarget: Moved the Kokkos_OpenMPTarget.hpp file inside OpenMPTarget dir.

---------

Co-authored-by: Rahulkumar Gayatri <[email protected]>
Co-authored-by: Daniel Arndt <[email protected]>

core/src/Kokkos_OpenMPTarget.hpp → core/src/OpenMPTarget/Kokkos_OpenMPTarget.hpp

@@ -30,7 +30,7 @@ static_assert(false,
 
 #include <cstddef>
 #include <iosfwd>
-#include <Kokkos_OpenMPTargetSpace.hpp>
+#include <OpenMPTarget/Kokkos_OpenMPTargetSpace.hpp>
 #include <Kokkos_ScratchSpace.hpp>
 #include <Kokkos_Parallel.hpp>
 #include <Kokkos_TaskScheduler.hpp>
@@ -141,7 +141,6 @@ struct DeviceTypeTraits<::Kokkos::Experimental::OpenMPTarget> {
 /*--------------------------------------------------------------------------*/
 /*--------------------------------------------------------------------------*/
 
-#include <OpenMPTarget/Kokkos_OpenMPTarget_Exec.hpp>
 #include <OpenMPTarget/Kokkos_OpenMPTarget_Parallel.hpp>
 #include <OpenMPTarget/Kokkos_OpenMPTarget_Parallel_MDRange.hpp>
 #include <OpenMPTarget/Kokkos_OpenMPTarget_Task.hpp>

core/src/OpenMPTarget/Kokkos_OpenMPTargetSpace.cpp

@@ -33,8 +33,8 @@
 #include <sstream>
 #include <cstring>
 
-#include <Kokkos_OpenMPTarget.hpp>
-#include <Kokkos_OpenMPTargetSpace.hpp>
+#include <OpenMPTarget/Kokkos_OpenMPTarget.hpp>
+#include <OpenMPTarget/Kokkos_OpenMPTargetSpace.hpp>
 #include <impl/Kokkos_Error.hpp>
 #include <Kokkos_Atomic.hpp>
 #include <impl/Kokkos_MemorySpace.hpp>