Patching refactor (#1450)

* New tests for patching utilities in patching.py

Signed-off-by: Charlelie Laurent <claurent@nvidia.com>

* Refactored patching.py

Signed-off-by: Charlelie Laurent <claurent@nvidia.com>

* Fixed global_index reference in patching.py

Signed-off-by: Charlelie Laurent <claurent@nvidia.com>

* Added docstring examples + recompile tests for patching.py

Signed-off-by: Charlelie Laurent <claurent@nvidia.com>

* Changed tests to fullgraph=True, and some cosmetic imrovements in patching.py

Signed-off-by: Charlelie Laurent <claurent@nvidia.com>

* Added TODO comment in patching.py

Signed-off-by: Charlelie Laurent <claurent@nvidia.com>

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Signed-off-by: Charlelie Laurent <claurent@nvidia.com>

Author: CharlelieLrt