Uninherit LanguageVersion from LanguageFeatureSettings

Introduce LanguageVersionSettingsImpl to store everything related to the
selected language version

compiler/tests-common/org/jetbrains/kotlin/renderer/AbstractDescriptorRendererTest.kt

@@ -20,7 +20,7 @@ import com.intellij.openapi.editor.impl.DocumentImpl
 import com.intellij.openapi.util.io.FileUtil
 import org.jetbrains.kotlin.cli.jvm.compiler.CliLightClassGenerationSupport
 import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
-import org.jetbrains.kotlin.config.LanguageVersion
+import org.jetbrains.kotlin.config.LanguageVersionSettingsImpl
 import org.jetbrains.kotlin.container.ComponentProvider
 import org.jetbrains.kotlin.container.get
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
@@ -62,7 +62,7 @@ abstract class AbstractDescriptorRendererTest : KotlinTestWithEnvironment() {
                 CliLightClassGenerationSupport.NoScopeRecordCliBindingTrace(),
                 JvmPlatform,
                 targetEnvironment,
-                LanguageVersion.LATEST
+                LanguageVersionSettingsImpl.DEFAULT
         )
 
         val resolveSession = container.get<ResolveSession>()

compiler/tests-common/org/jetbrains/kotlin/tests/di/injection.kt

@@ -17,7 +17,7 @@
 package org.jetbrains.kotlin.tests.di
 
 import com.intellij.openapi.project.Project
-import org.jetbrains.kotlin.config.LanguageVersion
+import org.jetbrains.kotlin.config.LanguageVersionSettingsImpl
 import org.jetbrains.kotlin.container.*
 import org.jetbrains.kotlin.context.ModuleContext
 import org.jetbrains.kotlin.descriptors.ModuleDescriptor
@@ -34,7 +34,7 @@ fun createContainerForTests(project: Project, module: ModuleDescriptor): Contain
     return ContainerForTests(createContainer("Tests") {
         configureModule(ModuleContext(module, project), JvmPlatform)
         useInstance(LookupTracker.DO_NOTHING)
-        useInstance(LanguageVersion.LATEST)
+        useInstance(LanguageVersionSettingsImpl.DEFAULT)
         useImpl<ExpressionTypingServices>()
     })
 }