[mlir] More Python bindings for AffineMap

[ftynse]

Summary

Now that the bindings for AffineExpr have been added, add more bindings for
constructing and inspecting AffineMap that consists of AffineExprs.

Depends On D94225

[ftynse]

mlir/lib/Bindings/Python/IRModules.cpp

3886–3903

These are instance methods that derive a new map from the given map in C++ so I kept them as such. An alternative approach is to make them static similarly to other get methods and take the map map as an explicit first argument.

[mehdi_amini]

mlir/lib/Bindings/Python/IRModules.cpp

3810

Can you spell the type here?

3874

Can't you take a vector of unsigned here? Pybind wouldn't be happy with it? It'll avoid the manual conversion.

3889

Seems like this would crash without more sanity checking here that none of the indices in resultPos overflow the AffineMap size.

I suspect other places have the same issue in sibling methods.

[ftynse]

Address review