[quantization] Add test suite for five different topological network structures

Add a test suite to validate five different network topologies and prevent regressions in the PTQ pipeline. This ensures stability and correctness across diverse topological configurations. Network topologies and accuracy are:

[Baseline | Quantized | Quantized with single shift approximation]

• MiniResNet: (95.4, 94.5, 94.7)
• ConvNet: (97.9, 97.7, 97.4)
• BranchNetV4: (93.8, 93.2, 93.7)
• TestNet: (95.5, 94.2, 94.2)
• MLP: (94.7, 94.2, 93.3)