FIR: Support loading deserialized declarations from JVM class files

compiler/fir/resolve/testData/loadCompiledKotlin/classObject/ClassObjectExtendsTrait.txt

@@ -0,0 +1,8 @@
+public abstract interface Bbb : R|kotlin/Any| {
+}
+
+public final class ClassObjectextendsTrait : R|kotlin/Any| {
+    public final companion object Companion : R|test/Bbb| {
+    }
+
+}