[FIR2IR] Run constant evaluation before IR extensions

Test `constValInSerialName` in serialization still fails but because of
  different reason

^KT-54994 Fixed

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrConverter.kt

@@ -98,6 +98,8 @@ class Fir2IrConverter(
             }
         }
 
+        evaluateConstants(irModuleFragment)
+
         if (irGenerationExtensions.isNotEmpty()) {
             val pluginContext = Fir2IrPluginContext(components, irModuleFragment.descriptor)
             for (extension in irGenerationExtensions) {
@@ -106,8 +108,6 @@ class Fir2IrConverter(
         }
 
         irModuleFragment.acceptVoid(ExternalPackageParentPatcher(components, fir2IrExtensions))
-
-        evaluateConstants(irModuleFragment)
     }
 
     fun bindFakeOverridesOrPostpone(declarations: List<IrDeclaration>) {