[Feature Request] Request to support rank 3 MaxPool on QNN EP

[aparmp-quic]

Describe the feature request

The current implementation of the pool_op_builder.cc in QNN-EP supports only inputs of rank 4. Support is needed to handle rank 3 as well.

Describe scenario use case

If the original ONNX model is having model input dimension as 3, then the rank of input at the MaxPool node through QNN-EP path will also be 3. This throws error at op support validation stage as it is not meeting the requirement of rank to be 4.