Use main class as test generator name

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

compiler/android-tests/tests/org/jetbrains/kotlin/android/tests/CodegenTestsOnAndroidGenerator.kt

@@ -435,7 +435,6 @@ class CodegenTestsOnAndroidGenerator private constructor(private val pathManager
         const val testClassName = "CodegenTestCaseOnAndroid"
         const val baseTestClassPackage = "org.jetbrains.kotlin.android.tests"
         const val baseTestClassName = "AbstractCodegenTestCaseOnAndroid"
-        const val generatorName = "CodegenTestsOnAndroidGenerator"
 
 
         @JvmOverloads

compiler/android-tests/tests/org/jetbrains/kotlin/android/tests/UnitTestFileWriter.kt

@@ -7,6 +7,7 @@ package org.jetbrains.kotlin.android.tests
 
 import com.intellij.openapi.util.io.FileUtil
 import com.intellij.openapi.util.text.StringUtil
+import org.jetbrains.kotlin.generators.util.TestGeneratorUtil.getMainClassName
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.NameUtils
 import org.jetbrains.kotlin.utils.Printer
@@ -34,7 +35,7 @@ class UnitTestFileWriter(
                 |
                 |import ${CodegenTestsOnAndroidGenerator.baseTestClassPackage}.${CodegenTestsOnAndroidGenerator.baseTestClassName};
                 |
-                |/* This class is generated by ${CodegenTestsOnAndroidGenerator.generatorName}. DO NOT MODIFY MANUALLY */
+                |/* This class is generated by ${getMainClassName()}. DO NOT MODIFY MANUALLY */
                 |public class ${flavourName.replaceFirstChar(Char::uppercaseChar)} extends ${CodegenTestsOnAndroidGenerator.baseTestClassName} {
                 |
             """.trimMargin()