[FE Test] Move FIR dumps for LoadCompiledKotlin tests close to original testdata

compiler/testData/loadJava/compiledKotlin/fromLoadJava/library/LoadIterator.fir.txt

@@ -0,0 +1,6 @@
+public abstract interface LoadIterator<T> : R|kotlin/Any| {
+    public abstract fun getIterator(): R|kotlin/collections/MutableIterator<T>?|
+
+    public abstract fun setIterator(p0: R|kotlin/collections/Iterator<T>?|): R|kotlin/Unit|
+
+}