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

compiler/testData/loadJava/compiledKotlin/prop/ExtVarIntTInClass.fir.txt

@@ -0,0 +1,8 @@
+public final class ExtValInClass<P> : R|kotlin/Any| {
+    public final var R|kotlin/Int|.asas: R|P|
+        public get(): R|P|
+        public set(p: R|P|): R|kotlin/Unit|
+
+    public constructor<P>(): R|test/ExtValInClass<P>|
+
+}