SDF: Expose optional setvar_vaddr for map and page_size for memory region.

[Kswin01]

Expose optional setvar_vaddr and page_size setting to the python interface.

[Ivan-Velickovic]

I think a better approach would be to have a Map.create and Map.createWithSetVar or something that takes an allocator instead. Right now you are passing an allocator everywhere but not actually deallocating. 99% of the time we do not need the allocation and so I think it warrants two APIs.

[Ivan-Velickovic]

I remember having .fromInt in sdf.zig for this case.

[Kswin01]

Yep missed that, I can switch to using that now. fromInt requires an architecture to be passed, should we change the API for mr_create so that a user can pass in the arch?

[Kswin01]

I think a better approach would be to have a Map.create and Map.createWithSetVar or something that takes an allocator instead. Right now you are passing an allocator everywhere but not actually deallocating. 99% of the time we do not need the allocation and so I think it warrants two APIs.

Switched to this implementation