Create test configuration files for operators

Context

Add a working configuration file for each operator to allow its testing in each module unit-tests. Each file is tested with backend_cpu implementations.

❓ = Cannot be compared with ONNXRuntime

• Abs
• Add
• And
• ArgMax
• Atan
• AvgPooling
• BatchNorm
• BitErrorRate -> ❓ (no equivalent in ONNX)
• BitShift
• Clip
• ConstantOfShape
• ConvDepthWise
• Conv
• ConvTranspose
• CryptoHash
• Div
• Dropout -> ❓ (different random number generation)
• Equal
• Erf
• Exp
• Expand
• FC
• FixedNBitFlip -> ❓ (no equivalent in ONNX)
• Fold -> ❓ (no equivalent in ONNX)
• Gemm
• GlobalAveragePooling
• GridSample
• HardSigmoid
• Hardswitch
• Hardmax
• Heaviside
• LRN
• LayerNorm
• LeakyReLU
• Ln
• LSTM
• MatMul
• Max
• MaxPooling
• Mod
• Mul
• NBitFlip -> ❓ (no equivalent in ONNX)
• Neg
• Pad
• PaddedConv
• Pow
• RandomNormalLike -> ❓ (different random number generation)
• ReLU
• Reciprocal
• ReduceMean
• ReduceSum
• Resize
• Round
• Scatter
• Sigmoid
• Slice
• Softmax
• Softplus
• Sqrt
• Sub
• Sum
• Tanh
• TopK
• WeightInterleaved -> ❓ (no equivalent in ONNX)
• Where