Use main class as test generator name

Merge-request: KT-MR-7031
Merged-by: Vladimir Sukharev <Vladimir.Sukharev@jetbrains.com>

compiler/tests-gen/org/jetbrains/kotlin/codegen/ScriptCodegenTestGenerated.java

@@ -16,7 +16,7 @@ import org.junit.runner.RunWith;
 import java.io.File;
 import java.util.regex.Pattern;
 
-/** This class is generated by {@link org.jetbrains.kotlin.generators.tests.TestsPackage}. DO NOT MODIFY MANUALLY */
+/** This class is generated by {@link org.jetbrains.kotlin.test.generators.GenerateCompilerTestsKt}. DO NOT MODIFY MANUALLY */
 @SuppressWarnings("all")
 @TestMetadata("compiler/testData/codegen/script")
 @TestDataPath("$PROJECT_ROOT")