Test data split between compiledJava tests and compiledKotlin tests

Basically, this commit splits test data from the from java-txt-kt to two pairs java-txt and kt-txt.
This commit leads to some duplication in test data.
This is temporary: in the platform types branch the test data for LoadJava tests will be changed dramatically, so duplication will go away

compiler/testData/loadJava/compiledKotlinWithStdlib/mutability/LoadIterableWithPropagation.kt

@@ -0,0 +1,24 @@
+package test
+
+import java.util.ArrayList
+import org.jetbrains.annotations.*
+
+public trait LoadIterableWithPropagation {
+    public trait LoadIterable<T> {
+        Mutable
+        public fun getIterable(): MutableIterable<T>?
+        public fun setIterable([Mutable] p0: MutableIterable<T>?)
+
+        ReadOnly
+        public fun getReadOnlyIterable(): Iterable<T>?
+        public fun setReadOnlyIterable([ReadOnly] p0: Iterable<T>?)
+    }
+
+    public open class LoadIterableImpl<T> : LoadIterable<T> {
+        public override fun getIterable(): MutableIterable<T>? = ArrayList<T>()
+        public override fun setIterable(p0: MutableIterable<T>?): Unit {}
+
+        public override fun getReadOnlyIterable(): Iterable<T>? = ArrayList<T>()
+        public override fun setReadOnlyIterable(p0: Iterable<T>?): Unit {}
+    }
+}