[request] Allow function overloads

[heysokam]

This is perfectly legal in Nim, because they are all different functions with different shapes:

But futhark sanitizes everything, and turns them into this instead:

proc release*(adapter: Adapter): void {.cdecl, importc: "wgpuAdapterRelease".}
proc releaseproc*(bindgroup: Bindgroup): void {.cdecl, importc: "wgpuBindGroupRelease".}
proc referenceproc00000000EAE069C7*(bindgrouplayout: Bindgrouplayout): void {.cdecl, importc: "wgpuBindGroupLayoutReference".}
proc releaseproc0000000036522FBD*(bindgrouplayout: Bindgrouplayout): void {.cdecl, importc: "wgpuBindGroupLayoutRelease".}

Would it be possible to have a flag that skips this name sanitation when opted into?

[heysokam]

Created a working version, but its very hacky
Would appreciate your input on how you would do these Unsafe*Names config options, while respecting your existing architecture
master...heysokam:futhark-overloads:master