Adding some export features

Context

This merge request only concerns Exports.

It aims to add back some control from the export itself as it adds the possibility to specify :

• The memory section in which the feature maps are stored;
• The main file template;
• Whether the network contains labels for the results verification within the main file.

Modified files

Memory Section

• forward.jinja : Add the section as attribute while creating the mem buffer.
• scheduler_exort.py : Add the mem_section as attribute to be read by the template.
• export_registry.py : Add the mem_section as class variable to be changed by the export.

Main file generation

• export_registry.py : Add the template file path as class variable to be specified by the export.
• scheduler_export.py : Add the template file path as argument to generate the main file. Note that the aidge template file will still be used by default.

Labels

• scheduler_export.py : Add an optional argument labels to the scheduler_export() function which is then passed as attribute while generating the main file.