allowDependency with dependencyProvider does not use attributes to resolve actual dependency

[hfhbd]

We map the dependency in dependencyProvider directly to its gav, but with Kotlin MPP, the gav can change to eg g:a-jvm:v resulting into failing check because g:a-jvm:v is not allowed, but g:a:v is.

=> Don't map the gav in the extension but during configuration when we access it with the actual attributes from the configuration.