[ao][sparsity] Base class for Data Sparsifier
Base Data Sparsifier class for all Data sparsifiers.
The abstract class accepts raw torch tensors / embedding / embedding bags (refer to SUPPORTED_TYPES above)
to prepare for sparsification.
In this case, mask (and parametrizations) is owned by the class and not by the user.
Specifically, the container object inside the class maintains the mask and parametrizations of the input data
Test Plan:
```python test/test_ao_sparsity.py TestBaseDataSparsifier```
Pull Request resolved: https://github.com/pytorch/pytorch/pull/79251
Approved by: https://github.com/z-a-f, https://github.com/HDCharles
