Suport all length one SLS op lowering: C2 part (#33332)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/33332
We check the input shape of lengths and indices of SLS and add an attribute if they are the same.
Test Plan:
```
buck test glow/fb/test/numerics:test_operator_onnxifinnpi -- test_slws_fused_8bit_rowwise_length1_graph
```
Reviewed By: ipiszy
Differential Revision: D19874903
fbshipit-source-id: 06b643b5351d0ba19ba209b5a5b599fbb38b1dfc
