[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/prop/nonConstValWithConstantValueAttribute.fir.txt

@@ -0,0 +1,29 @@
+public final val nonConstVal1: R|kotlin/Int|
+    public get(): R|kotlin/Int|
+
+public final class C : R|kotlin/Any| {
+    public final val nonConstVal2: R|kotlin/Int|
+        public get(): R|kotlin/Int|
+
+    public constructor(): R|test/C|
+
+    public final companion object Companion : R|kotlin/Any| {
+        public final val nonConstVal3: R|kotlin/Int|
+            public get(): R|kotlin/Int|
+
+        private constructor(): R|test/C.Companion|
+
+    }
+
+}
+
+public abstract interface I : R|kotlin/Any| {
+    public final companion object Companion : R|kotlin/Any| {
+        public final val nonConstVal4: R|kotlin/Int|
+            public get(): R|kotlin/Int|
+
+        private constructor(): R|test/I.Companion|
+
+    }
+
+}