[ORC] Move OrcError.h to include/llvm/ExecutionEngine/Orc/Shared.

OrcShared is the correct home for this header since Orc was split in
1d0676b54c4. (It should have been moved in that commit, but was overlooked).

GitOrigin-RevId: 24672ddea3c97fd1eca3e905b23c0116d7759ab8
11 files changed