[MLIR][Linalg] Generate unique LibraryCallName for LinalgOps.

When lowering LinalgToStandard for named UnaryFn/BinaryFn ops, ensure
the fun name appears in the generated library name. Further, for
linalg.copy to/from different address spaces, ensure the to/from
address spaces are appended onto the library name for uniqueness.
This fixes the lowering error with the linalg.copy testcase shown in
this patch.

Reviewed By: ftynse

Differential Revision: https://reviews.llvm.org/D145467