Arguments to GPU Kernel Not Correctly Detected

This error happens in conjunction with `CopyToMap`.
The transformation is called by the code generator, to remove some Memlets and turn them into a Map.
However, in some cases I get the errors that some symbols are not defined.

I traced the error back to the function that computes the arguments of a kernel.
I recently fixed a [related bug](https://github.com/spcl/dace/pull/1708), but it seems that there is more.