JVM_IR: slightly refactor JvmPropertiesLowering

to make it easier to generate different kinds of synthetic methods.

 #KT-47609 Fixed

compiler/fir/fir2ir/tests-gen/org/jetbrains/kotlin/test/runners/codegen/FirBlackBoxCodegenTestGenerated.java

@@ -18850,6 +18850,12 @@ public class FirBlackBoxCodegenTestGenerated extends AbstractFirBlackBoxCodegenT
             runTest("compiler/testData/codegen/box/inlineClasses/kt46554.kt");
         }
 
+        @Test
+        @TestMetadata("kt47609.kt")
+        public void testKt47609() throws Exception {
+            runTest("compiler/testData/codegen/box/inlineClasses/kt47609.kt");
+        }
+
         @Test
         @TestMetadata("mangledDefaultParameterFunction.kt")
         public void testMangledDefaultParameterFunction() throws Exception {