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/compiledJava/kotlinSignature/MethodWithGenerics.txt

@@ -0,0 +1,6 @@
+package test
+
+public open class MethodWithGenerics {
+    public constructor MethodWithGenerics()
+    public open fun foo(/*0*/ a: kotlin.String, /*1*/ b: kotlin.List<kotlin.Map.Entry<kotlin.String?, kotlin.String>?>): kotlin.String
+}