[sozo] ability to skip migration for certain contracts

[itzlambda]

Is your feature request related to a problem? Please describe. In some cases users build certain contracts for testing or other uses and those are not required to be migrated, currently sozo just checks all the compiled artificats to figure out which to deploy

Describe the solution you'd like Have a configuration of list of contracts to exclusively not migrate inside tool.dojo

Describe alternatives you've considered We can also have a flag in compiled artifact specifying if they need to be migrated or not