Scaled and non-scaled QuantHardTanh activation tests separated. Non-scaled test includes cases with scale parameter == 1. In scaled test, bipolar activation is excluded as it's not currently supported

Add new test cases for QuantHardTanh. Cases for max > 1 and scaling_impl_type == ScalingImplType.PARAMETER with learned scale

HLS streaming nodes already have small FIFOs at i/o

Feature/streaming fifo