Integrate max cut on FLNs in mixed-precision

[reuvenperetz]

Pull Request Description:

Integrate max cut on FLNs in mixed-precision RU computation. Change the computation of RU to be on the original graph instead of the virtual graph in case of BOPs computation (this is equivalent, but needed for when BOPs and activations are restricted).

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).