Use internal config for dependency tree (for Provided)

**Problem**
dependency-tree currently doesn't include Provided configuration,
because technically it isn't part of the Compile configuration,
however, Provided does become part of the Compile classpath during compilation.

**Solution**
This changes the implementation to use the internal configuration,
e.g. CompileInternal, which includes the auxilary configurations.

There's a tradeoff here since it means that we lose the tree view of
the platonic Compile configuration.

main/src/main/scala/sbt/plugins/DependencyTreeSettings.scala

@@ -70,8 +70,9 @@ object DependencyTreeSettings {
       ),
       dependencyTreeModuleGraph0 := {
         val sv = scalaVersion.value
+        val internalConfig = Configurations.internalMap(configuration.value)
         val g = dependencyTreeIgnoreMissingUpdate.value
-          .configuration(configuration.value)
+          .configuration(internalConfig)
           .map(
             report =>
               SbtUpdateReport.fromConfigurationReport(report, dependencyTreeCrossProjectId.value)