[Native][tests] Move golden data outside of Gradle build file

kotlin-native/backend.native/tests/interop/cpp/skia.out

@@ -0,0 +1,10 @@
+SkFoo()
+SkData()
+SkData()
+SkValue()
+SkData()
+MANAGED: f: true, a: true, b: false, v: true, c: false
+DATA: 17 19 17 17
+unref
+~SkData()
+~SkFoo()

kotlin-native/backend.native/tests/interop/cpp/skiaSignature.out

@@ -0,0 +1,7 @@
+SkData()
+SkData(19)
+SkData(SkData*)
+SkData(SkData*, SkData*)
+SkData(200)
+SkData(436)
+true true true true true