[FIR Test] Migrate AbstractFirLoadCompiledKotlin to new test infrastructure

Also introduce two different modes for those tests:
- load metadata compiled with K1
- load metadata compiled with K2

compiler/testData/loadJava/compiledKotlin/memberOrder/innerClasses.fir.txt

@@ -0,0 +1,30 @@
+public final class O : R|kotlin/Any| {
+    public constructor(): R|test/O|
+
+    public final class A1 : R|kotlin/Any| {
+        public constructor(): R|test/O.A1|
+
+    }
+
+    public final inner class A2 : R|kotlin/Any| {
+        public test/O.constructor(): R|test/O.A2|
+
+    }
+
+    public final class B1 : R|kotlin/Any| {
+        public constructor(): R|test/O.B1|
+
+    }
+
+    public final inner class B2 : R|kotlin/Any| {
+        public test/O.constructor(): R|test/O.B2|
+
+    }
+
+    public abstract interface C1 : R|kotlin/Any| {
+    }
+
+    public abstract interface C2 : R|kotlin/Any| {
+    }
+
+}