Use standard @Deprecated in place of special opt-in annotation

Remove @DeprecatedVisitor

libraries/tools/kotlinp/test/org/jetbrains/kotlin/kotlinp/test/KotlinpTestUtils.kt

@@ -7,7 +7,6 @@ package org.jetbrains.kotlin.kotlinp.test
 
 import com.intellij.openapi.Disposable
 import junit.framework.TestCase.assertEquals
-import kotlinx.metadata.DeprecatedVisitor
 import kotlinx.metadata.jvm.KotlinClassMetadata
 import kotlinx.metadata.jvm.KotlinModuleMetadata
 import org.jetbrains.kotlin.checkers.setupLanguageVersionSettingsForCompilerTests
@@ -26,7 +25,6 @@ import org.jetbrains.kotlin.test.util.KtTestUtil
 import java.io.File
 import kotlin.test.fail
 
-@OptIn(DeprecatedVisitor::class)
 fun compileAndPrintAllFiles(file: File, disposable: Disposable, tmpdir: File, compareWithTxt: Boolean, readWriteAndCompare: Boolean) {
     val main = StringBuilder()
     val afterVisitors = StringBuilder()
@@ -99,8 +97,7 @@ private fun StringBuilder.appendFileName(file: File) {
 // Reads the class file and writes it back with *Writer visitors.
 // The resulting class file should be the same from the point of view of any metadata reader, including kotlinp
 // (the exact bytes may differ though, because there are multiple ways to encode the same metadata)
-@Suppress("DEPRECATION_ERROR")
-@DeprecatedVisitor // TODO: not sure this test is needed at all now
+@Suppress("DEPRECATION")
 private fun transformClassFileWithReadWriteVisitors(classFile: KotlinClassMetadata): KotlinClassMetadata =
     when (classFile) {
         is KotlinClassMetadata.Class -> KotlinClassMetadata.Class.Writer().apply(classFile::accept).write()
@@ -132,8 +129,7 @@ private fun transformClassFileWithNodes(classFile: KotlinClassMetadata): KotlinC
         else -> classFile
     }
 
-@Suppress("DEPRECATION_ERROR")
-@DeprecatedVisitor
+@Suppress("DEPRECATION")
 private fun transformModuleFileWithReadWriteVisitors(moduleFile: KotlinModuleMetadata): KotlinModuleMetadata =
     KotlinModuleMetadata.Writer().apply(moduleFile::accept).write()