FIR: introduce delegate field initializers

Before this commit we initialized delegate fields in primary constructor,
that could provoke NPE in case delegate is used in initializer of
some property backing field.
Now we initialize delegate fields directly instead.

compiler/tests-gen/org/jetbrains/kotlin/codegen/LightAnalysisModeTestGenerated.java

@@ -12273,6 +12273,11 @@ public class LightAnalysisModeTestGenerated extends AbstractLightAnalysisModeTes
             runTest("compiler/testData/codegen/box/fir/FakeOverrideBuilder.kt");
         }
 
+        @TestMetadata("Fir2IrClassifierStorage.kt")
+        public void testFir2IrClassifierStorage() throws Exception {
+            runTest("compiler/testData/codegen/box/fir/Fir2IrClassifierStorage.kt");
+        }
+
         @TestMetadata("IrBuiltIns.kt")
         public void testIrBuiltIns() throws Exception {
             runTest("compiler/testData/codegen/box/fir/IrBuiltIns.kt");