Qualcomm AI Engine Direct - Fix LPAI Partitioner QDQ Ops

[winskuo-quic]

Summary

We made assumption that source node always saves quant_attrs target using quant_node, however, if a node's input is a constant, it will be using dequant_node's quant attrs. This assumption causes some error during node creation when are creating qdq nodes. To resolve this issue, we make quant and de-quant node explicit instead of relying on source node's quant attributes target.

Test plan

Passing UT for lpai paritioner

[pytorch-bot]

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