Relocate optimization specific processes to lava-optimization and out of lava/proc

[GaboFGuerra]

Objective of pull request: Relocate optimization specific processes to lava-optimization and out of lava/proc.

Pull request checklist

Your PR fulfills the following requirements:

• Tests are part of the PR (for bug fixes / features)
• Docs reviewed and added / updated if needed (for bug fixes / features)
• PR conforms to Coding Conventions
• PR applys BSD 3-clause or LGPL2.1+ Licenses to all code files
• Lint (pyb) passes locally
• Build tests (pyb -E unit) or (python -m unittest) passes locally

Pull request type

Please check your PR type:

• Refactoring

What is the current behavior?

• Optimization specific processes are exposed under lava/proc which is intended for generic processes.

What is the new behavior?

• Processes specific to the optimization library have been moved under lava/lib/optimization/solvers/generic/processes.

Does this introduce a breaking change?

• Yes

Supplemental information

The import path for ReadGate, QuboScif and CostIntegrator are changed, they are not longer under lava.proc but under lava.optimization.solvers.generic.processes

[AlessandroPierro]

Tests on Scif are failing with:

lava.magma.compiler.exceptions.NoProcessModelFound: No ProcessModels found that implement Process '<lava.lib.optimization.solvers.generic.scif.process.QuboScif object at 0x7ffa90c57d60>'

[phstratmann]

Tests on Scif are failing with:

lava.magma.compiler.exceptions.NoProcessModelFound: No ProcessModels found that implement Process '<lava.lib.optimization.solvers.generic.scif.process.QuboScif object at 0x7ffa90c57d60>'

And with

[phstratmann]

Before merging, please ensure that the license headers are correct! Currently, they are wrong for the test files, see my comments.

Didn't review the code in detail, as it has been reviewed previously. Only the new places for the files.

Thanks for your great work :-)

[GaboFGuerra]

solved