JVM IR, FIR: add JvmBackendExtension instead of MetadataSerializerFactory

This might be a better place for future behavior that should be
abstracted between FE 1.0 and FIR, in JVM IR.

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/backend/ir/IrBackendInput.kt

@@ -6,8 +6,8 @@
 package org.jetbrains.kotlin.test.backend.ir
 
 import org.jetbrains.kotlin.backend.common.phaser.PhaseConfig
+import org.jetbrains.kotlin.backend.jvm.JvmBackendExtension
 import org.jetbrains.kotlin.backend.jvm.JvmGeneratorExtensions
-import org.jetbrains.kotlin.backend.jvm.MetadataSerializerFactory
 import org.jetbrains.kotlin.codegen.state.GenerationState
 import org.jetbrains.kotlin.ir.declarations.IrModuleFragment
 import org.jetbrains.kotlin.ir.linkage.IrProvider
@@ -25,7 +25,7 @@ data class IrBackendInput(
     val phaseConfig: PhaseConfig,
     val irProviders: List<IrProvider>,
     val extensions: JvmGeneratorExtensions,
-    val serializerFactory: MetadataSerializerFactory
+    val backendExtension: JvmBackendExtension,
 ) : ResultingArtifact.BackendInput<IrBackendInput>() {
     override val kind: BackendKinds.IrBackend
         get() = BackendKinds.IrBackend

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/backend/ir/JvmIrBackendFacade.kt

@@ -16,7 +16,7 @@ class JvmIrBackendFacade(
         module: TestModule,
         inputArtifact: IrBackendInput
     ): BinaryArtifacts.Jvm {
-        val (state, irModuleFragment, symbolTable, sourceManager, phaseConfig, irProviders, extensions, serializerFactory) = inputArtifact
+        val (state, irModuleFragment, symbolTable, sourceManager, phaseConfig, irProviders, extensions, backendExtension) = inputArtifact
 
         val codegenFactory = state.codegenFactory as JvmIrCodegenFactory
         codegenFactory.doGenerateFilesInternal(
@@ -27,7 +27,7 @@ class JvmIrBackendFacade(
             phaseConfig,
             irProviders,
             extensions,
-            serializerFactory
+            backendExtension,
         )
         state.factory.done()
 

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/frontend/classic/ClassicFrontend2IrConverter.kt

@@ -9,11 +9,7 @@ import org.jetbrains.kotlin.backend.common.extensions.IrGenerationExtension
 import org.jetbrains.kotlin.backend.common.extensions.IrPluginContextImpl
 import org.jetbrains.kotlin.backend.common.ir.BuiltinSymbolsBase
 import org.jetbrains.kotlin.backend.common.phaser.PhaseConfig
-import org.jetbrains.kotlin.backend.jvm.JvmGeneratorExtensions
-import org.jetbrains.kotlin.backend.jvm.JvmIrCodegenFactory
-import org.jetbrains.kotlin.backend.jvm.JvmNameProvider
-import org.jetbrains.kotlin.backend.jvm.codegen.DescriptorMetadataSerializer
-import org.jetbrains.kotlin.backend.jvm.jvmPhases
+import org.jetbrains.kotlin.backend.jvm.*
 import org.jetbrains.kotlin.backend.jvm.serialization.JvmIdSignatureDescriptor
 import org.jetbrains.kotlin.cli.common.CLIConfigurationKeys
 import org.jetbrains.kotlin.codegen.ClassBuilderFactories
@@ -152,7 +148,7 @@ class ClassicFrontend2IrConverter(
             phaseConfig,
             irProviders,
             extensions,
-            ::DescriptorMetadataSerializer
+            JvmBackendExtension.Default,
         )
     }
 }

compiler/tests-common-new/tests/org/jetbrains/kotlin/test/frontend/fir/Fir2IrResultsConverter.kt

@@ -16,7 +16,7 @@ import org.jetbrains.kotlin.codegen.ClassBuilderFactories
 import org.jetbrains.kotlin.codegen.state.GenerationState
 import org.jetbrains.kotlin.container.get
 import org.jetbrains.kotlin.fir.backend.jvm.FirJvmBackendClassResolver
-import org.jetbrains.kotlin.fir.backend.jvm.FirMetadataSerializer
+import org.jetbrains.kotlin.fir.backend.jvm.FirJvmBackendExtension
 import org.jetbrains.kotlin.fir.psi
 import org.jetbrains.kotlin.ir.descriptors.IrFunctionFactory
 import org.jetbrains.kotlin.ir.util.generateTypicalIrProviderList
@@ -89,8 +89,7 @@ class Fir2IrResultsConverter(
             phaseConfig,
             irProviders,
             extensions,
-        ) { context, irClass, _, serializationBindings, parent ->
-            FirMetadataSerializer(inputArtifact.session, context, irClass, serializationBindings, components, parent)
-        }
+            FirJvmBackendExtension(inputArtifact.session, components)
+        )
     }
 }