Update BatchNorm and add fuseBatchNorm test

See merge request eclipse/aidge/aidge_backend_cpu!27

[MIN][DSGN] encapsulating raw pointer access into an helper function in order...

See merge request eclipse/aidge/aidge_backend_cpu!24

[fix/rawPtr][MIN][DSGN] encapsulating raw pointer access into an helper function in order to make it easier to change implementation related to aidge_core#21 and related to aidge_core!41 (which will get easier to merge threafter)

Tiling

See merge request !23

Update operators implementation

See merge request !22

- adapt to core changes with Operator not refering to Tensors anymore
- remove assertions already performed in abstract operators constructions
- fix missing 'template' keyword prior to dependent template name 'dims'

Add Scaling operator

See merge request !21

add sqrt operator

See merge request !18

# Conflicts:
#   include/aidge/backend/cpu.hpp

Binary operators

See merge request !19