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/StarProjection.txt

@@ -0,0 +1,9 @@
+package test
+
+public final class StarProjection {
+    public constructor StarProjection()
+    public final fun foo(): test.StarProjection.MyClass<out kotlin.CharSequence?>
+
+    public trait MyClass</*0*/ T : kotlin.CharSequence?> {
+    }
+}