new rule: redeclared dependency

[RBusarow]

This rule should find and remove and a dependency declaration where

• the exact same dependency is declared multiple times in this same module (leave one of them)
• the same dependency is declared in an upstream source set in the same module (if api and testImplementation, then testImplementation is a redeclaration)
• the same dependency is declared for different configurations of the same source set -- typically api and implementation. In this case, the upstream config (api) wins.