[K2, MPP] Remove redundant expect declarations from klib metadata

^KT-57250 Fixed

Introduce flat Fir2IrActualizedResult

It contains output from Fir2Ir and IrActualizer

js/js.tests/test/org/jetbrains/kotlin/incremental/FirAbstractInvalidationTest.kt

@@ -14,7 +14,8 @@ import org.jetbrains.kotlin.codegen.ProjectInfo
 import org.jetbrains.kotlin.config.CompilerConfiguration
 import org.jetbrains.kotlin.config.languageVersionSettings
 import org.jetbrains.kotlin.diagnostics.DiagnosticReporterFactory
-import org.jetbrains.kotlin.ir.backend.js.*
+import org.jetbrains.kotlin.ir.backend.js.MainModule
+import org.jetbrains.kotlin.ir.backend.js.ModulesStructure
 import org.jetbrains.kotlin.test.TargetBackend
 import java.io.ByteArrayOutputStream
 import java.io.File
@@ -66,12 +67,12 @@ abstract class FirAbstractInvalidationTest(
         )
 
         if (outputs != null) {
-            val irResult = transformFirToIr(moduleStructure, outputs, diagnosticsReporter)
+            val fir2IrActualizedResult = transformFirToIr(moduleStructure, outputs, diagnosticsReporter)
 
             serializeFirKlib(
                 moduleStructure = moduleStructure,
                 firOutputs = outputs,
-                irResult = irResult,
+                fir2IrActualizedResult = fir2IrActualizedResult,
                 outputKlibPath = outputKlibFile.absolutePath,
                 messageCollector = messageCollector,
                 diagnosticsReporter = diagnosticsReporter,

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

@@ -65,14 +65,17 @@ class FirJsKlibBackendFacade(
         val diagnosticReporter = DiagnosticReporterFactory.createReporter()
 
         if (firstTimeCompilation) {
-            if (module.frontendKind == FrontendKinds.FIR && module.languageVersionSettings.supportsFeature(LanguageFeature.MultiPlatformProjects)) {
-                IrActualizer.actualize(
-                    inputArtifact.mainModuleFragment,
-                    inputArtifact.dependentModuleFragments,
-                    diagnosticReporter,
-                    configuration.languageVersionSettings
-                )
-            }
+            val irActualizationResult =
+                if (module.frontendKind == FrontendKinds.FIR && module.languageVersionSettings.supportsFeature(LanguageFeature.MultiPlatformProjects)) {
+                    IrActualizer.actualize(
+                        inputArtifact.mainModuleFragment,
+                        inputArtifact.dependentModuleFragments,
+                        diagnosticReporter,
+                        configuration.languageVersionSettings
+                    )
+                } else {
+                    null
+                }
 
             serializeModuleIntoKlib(
                 configuration[CommonConfigurationKeys.MODULE_NAME]!!,
@@ -88,9 +91,10 @@ class FirJsKlibBackendFacade(
                 perFile = false,
                 containsErrorCode = inputArtifact.hasErrors,
                 abiVersion = KotlinAbiVersion.CURRENT, // TODO get from test file data
-                jsOutputName = null,
-                inputArtifact.serializeSingleFile
-            )
+                jsOutputName = null
+            ) {
+                inputArtifact.serializeSingleFile(it, irActualizationResult)
+            }
         }
 
         // TODO: consider avoiding repeated libraries resolution

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

@@ -61,9 +61,10 @@ class JsKlibBackendFacade(
                 perFile = false,
                 containsErrorCode = inputArtifact.hasErrors,
                 abiVersion = KotlinAbiVersion.CURRENT, // TODO get from test file data
-                jsOutputName = null,
-                inputArtifact.serializeSingleFile
-            )
+                jsOutputName = null
+            ) {
+                inputArtifact.serializeSingleFile(it, null)
+            }
         }
 
         val dependencies = JsEnvironmentConfigurator.getAllRecursiveDependenciesFor(module, testServices).toList()