Fix PyTorch model reader

[elad-c]

Pull Request Description:

Fix PyTorch model reader for nodes with list input (e.g. concat), when both inputs are the same tensor (i.e. concat([x, x], dim=2)).

Checklist before requesting a review:

• I set the appropriate labels on the pull request.
• I have added/updated the release note draft (if necessary).
• I have updated the documentation to reflect my changes (if necessary).
• All function and files are well documented.
• All function and classes have type hints.
• There is a licenses in all file.
• The function and variable names are informative.
• I have checked for code duplications.
• I have added new unittest (if necessary).

[ofirgo]

Jsut two minor comments