[Gradle] CInteropMetadataDependencyTransformationTask: Ignore project dependencies

Included builds will still resolve using a regular
ArtifactMetadataProvider (but using a ProjectComponentIdentifier).

Such dependencies shall not try to go through cinterop metadata
transformation. Right now commonized dependencies from
included builds will just not be visible/exported to the
consumer builds.

Using cinterop declarations inside the API surface will
not be enabled until more stability guarantees for cinterops can
be provided

^KT-56115 Verification Pending

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/native/internal/CInteropMetadataDependencyTransformationTask.kt

@@ -158,7 +158,7 @@ internal open class CInteropMetadataDependencyTransformationTask @Inject constru
         get() = sourceSet
             .compileDependenciesTransformationOrFail
             .metadataDependencyResolutions
-            .filterIsInstance<ChooseVisibleSourceSets>()
+            .resolutionsToTransform()
 
     @Suppress("unused")
     @get:Nested
@@ -188,7 +188,7 @@ internal open class CInteropMetadataDependencyTransformationTask @Inject constru
         into this field
          */
         val transformation = GranularMetadataTransformation(parameters, ParentSourceSetVisibilityProvider.Empty)
-        val chooseVisibleSourceSets = transformation.metadataDependencyResolutions.filterIsInstance<ChooseVisibleSourceSets>()
+        val chooseVisibleSourceSets = transformation.metadataDependencyResolutions.resolutionsToTransform()
         val transformedLibraries = chooseVisibleSourceSets.flatMap(::materializeMetadata)
         KotlinMetadataLibrariesIndexFile(outputLibrariesFileIndex.get().asFile).write(transformedLibraries)
     }
@@ -216,5 +216,11 @@ internal open class CInteropMetadataDependencyTransformationTask @Inject constru
             }
         }.files
     }
+
+    private fun Iterable<MetadataDependencyResolution>.resolutionsToTransform(): List<ChooseVisibleSourceSets> {
+        return filterIsInstance<ChooseVisibleSourceSets>()
+            /* We do not care about Project to Project dependencies: Those shall use the commonizer output directly (no transformation) */
+            .filter { it.dependency.id !is ProjectComponentIdentifier }
+    }
 }