[QNN EP] Handle rank 3 InstanceNormalization with N != 1 (#17897)
### Description
The QNN HTP backend does not support rank 3 InstanceNorm if the batch
size is not 1. To work around this limitation, QNN EP can wrap a rank 4
QNN InstanceNorm op with Reshapes (with the H dim set to 1).
### Motivation and Context
Enable support for more models.