[Test] Get rid of some properties in IrBackendInput

`fir2IrComponents`, `irActualizerResult` and `dependentIrModuleFragments`
  were used in `IrActualizerAndPluginsFacade`, which was removed in the
  previous commit

js/js.tests/test/org/jetbrains/kotlin/js/test/converters/FirJsKlibBackendFacade.kt

@@ -74,7 +74,7 @@ class FirJsKlibBackendFacade(
                 abiVersion = KotlinAbiVersion.CURRENT, // TODO get from test file data
                 jsOutputName = null
             ) {
-                inputArtifact.serializeSingleFile(it, inputArtifact.irActualizerResult)
+                inputArtifact.serializeSingleFile(it, TODO("Will be fixed in the next commit"))
             }
         }
 

js/js.tests/test/org/jetbrains/kotlin/js/test/converters/JsKlibBackendFacade.kt

@@ -63,7 +63,7 @@ class JsKlibBackendFacade(
                 abiVersion = KotlinAbiVersion.CURRENT, // TODO get from test file data
                 jsOutputName = null
             ) {
-                inputArtifact.serializeSingleFile(it, inputArtifact.irActualizerResult)
+                inputArtifact.serializeSingleFile(it, TODO("Will be fixed in the next commit"))
             }
         }