Implement core TessellateIPU factory methods directly in C++

Support some of these directly in the C++ codebase, and present in `nanobind` Python bindings:
```python
from_numpy_dtype_to_ipu_type,
make_ipu_vertex_attributes,
make_ipu_vertex_constant_info,
make_ipu_vertex_inputs,
make_ipu_vertex_io_info,
make_ipu_vertex_name_templated,
make_ipu_vertex_outputs,
```