JVM IR: introduce CodegenFactory.convertToIr

The steps of psi2ir and JVM backend need to be separated in the API
because in case of cyclic module dependencies (which are allowed in JPS)
psi2ir should be run first on all sources, and then JVM backend on each
module separately. `CodegenFactory.convertToIr` does nothing in the old
backend.

Also, move the ignoreErrors to GenerationState for simplicity.

plugins/scripting/scripting-compiler/src/org/jetbrains/kotlin/scripting/compiler/plugin/impl/KJvmReplCompilerBase.kt

@@ -19,6 +19,7 @@ import org.jetbrains.kotlin.cli.common.messages.MessageCollectorBasedReporter
 import org.jetbrains.kotlin.cli.common.repl.LineId
 import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
 import org.jetbrains.kotlin.codegen.ClassBuilderFactories
+import org.jetbrains.kotlin.codegen.CodegenFactory
 import org.jetbrains.kotlin.codegen.KotlinCodegenFacade
 import org.jetbrains.kotlin.codegen.state.GenerationState
 import org.jetbrains.kotlin.config.JVMConfigurationKeys
@@ -200,7 +201,10 @@ open class KJvmReplCompilerBase<AnalyzerT : ReplCodeAnalyzerBase>(
             .codegenFactory(codegenFactory)
             .build()
 
-        generationState.codegenFactory.generateModule(generationState, generationState.files)
+        codegenFactory.generateModule(
+            generationState,
+            codegenFactory.convertToIr(CodegenFactory.IrConversionInput.fromGenerationState(generationState)),
+        )
 
         return generationState
     }