Move common logic from CodegenTestCase to KotlinBaseTest

compiler/tests/org/jetbrains/kotlin/codegen/AbstractCustomScriptCodegenTest.kt

@@ -37,6 +37,7 @@ abstract class AbstractCustomScriptCodegenTest : CodegenTestCase() {
     }
 
     override fun updateConfiguration(configuration: CompilerConfiguration) {
+        super.updateConfiguration(configuration)
         if (scriptDefinitions.isNotEmpty()) {
             configureScriptDefinitions(
                 scriptDefinitions, configuration, this::class.java.classLoader, MessageCollector.NONE, defaultJvmScriptingHostConfiguration

compiler/tests/org/jetbrains/kotlin/codegen/ir/IrGenerateNotNullAssertionsTest.java

@@ -5,6 +5,7 @@
 
 package org.jetbrains.kotlin.codegen.ir;
 
+import org.jetbrains.annotations.NotNull;
 import org.jetbrains.kotlin.codegen.AbstractGenerateNotNullAssertionsTest;
 import org.jetbrains.kotlin.test.TargetBackend;
 
@@ -13,6 +14,7 @@ public class IrGenerateNotNullAssertionsTest extends AbstractGenerateNotNullAsse
         doTestNoAssertionsForKotlinFromBinary("noAssertionsForKotlin.kt", "noAssertionsForKotlinMain.kt");
     }
 
+    @NotNull
     @Override
     protected TargetBackend getBackend() {
         return TargetBackend.JVM_IR;