feat: qlinear conv

[chachaleo]

Pull Request type

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build-related changes
• Documentation content changes
• Other (please describe):

What is the current behavior:

Issue Number: #128

I have done the implementation in a similar way than the rest of the quantization operator and I have a small error with most of the test I made (max|error| = 1, but it can be a significant error on the type I8). Should I investigate further on this ?

Also, for each quantization operator we have X of quantized type Q and scale and zero point of dequantized type T. On ONNX they have X and zero point of type Q and scale of type T. Is it a choice of implementation or is it something that should be changed to be closer to the ONNX interface ? I can open an issue on filling the gap bitween the ONNX implementation of quantization operators and Orion implementation if you think there is a need for that :)

[raphaelDkhn]

Lgtm!