Fix some operators
Context
The following operators have not been fully updated during the recent refactoring of exports: [Transpose], [Gather], [Reshape], [BatchNorm2D].
A bug has also been detected regarding the [MatMul] operator in the layer configuration (index 0 instead of 1 for the second input).
The proposed modifications should be considered as a contribution to solve the following issue: !39
Detailed major modifications
- Update and Bug Fix,
- Transformation of "input vectors" of kernel functions into "constant variables (const)" for a safe implementation.