Support "-language-version" CLI option for compatibility with older releases

Introduce LanguageFeatureSettings, instance of which should be injected by the
container and be accessible everywhere during the compilation (front-end and
back-end).

Parameters of LanguageFeatureSettings are unused in this commit, will be used
later

compiler/tests-java8/tests/org/jetbrains/kotlin/serialization/builtins/AdditionalBuiltInsMembersSignatureListsTest.kt

@@ -19,6 +19,7 @@ package org.jetbrains.kotlin.serialization.builtins
 import com.intellij.psi.search.GlobalSearchScope
 import org.jetbrains.kotlin.cli.jvm.compiler.CliLightClassGenerationSupport
 import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
+import org.jetbrains.kotlin.config.LanguageFeatureSettings
 import org.jetbrains.kotlin.context.ModuleContext
 import org.jetbrains.kotlin.descriptors.PackagePartProvider
 import org.jetbrains.kotlin.descriptors.resolveClassByFqName
@@ -53,9 +54,10 @@ class AdditionalBuiltInsMembersSignatureListsTest : KotlinTestWithEnvironment()
         val providerFactory = FileBasedDeclarationProviderFactory(moduleContext.storageManager, emptyList())
 
         val container = createContainerForTopDownAnalyzerForJvm(
-                moduleContext,
-                CliLightClassGenerationSupport.CliBindingTrace(), providerFactory,
-                GlobalSearchScope.allScope(environment.project), LookupTracker.DO_NOTHING, PackagePartProvider.EMPTY)
+                moduleContext, CliLightClassGenerationSupport.CliBindingTrace(), providerFactory,
+                GlobalSearchScope.allScope(environment.project), LookupTracker.DO_NOTHING, PackagePartProvider.EMPTY,
+                LanguageFeatureSettings.LATEST
+        )
 
         emptyModule.initialize(container.javaDescriptorResolver.packageFragmentProvider)
         emptyModule.setDependencies(emptyModule)