Update to kotlinx-metadata-jvm 0.6.2

Migrate to the new API in kotlin-reflect build script, remove obsolete
workarounds.

plugins/jvm-abi-gen/test/org/jetbrains/kotlin/jvm/abi/BaseJvmAbiTest.kt

@@ -7,7 +7,6 @@ package org.jetbrains.kotlin.jvm.abi
 
 import com.intellij.openapi.util.io.FileUtil
 import junit.framework.TestCase
-import kotlinx.metadata.jvm.KotlinClassMetadata
 import org.jetbrains.kotlin.cli.common.ExitCode
 import org.jetbrains.kotlin.cli.jvm.K2JVMCompiler
 import org.jetbrains.kotlin.codegen.CodegenTestUtil
@@ -84,14 +83,6 @@ abstract class BaseJvmAbiTest : TestCase() {
 
             if (InTextDirectivesUtils.findStringWithPrefixes(directives, "// USE_K2") != null) {
                 useK2 = true
-
-                // Force metadata version 1.9 to circumvent the fact that kotlinx-metadata-jvm 0.6.0 has default metadata version 1.8,
-                // so it can read/write metadata with versions up to and including 1.9, yet K2 has metadata version 2.0+.
-                // This hack can be removed once jvm-abi-gen depends on kotlinx-metadata-jvm that can read/write metadata version 2.0.
-                // Without this hack, CompileAgainstJvmAbiTestGenerated.testInlineClassWithPrivateConstructorK2 currently fails.
-                if (KotlinClassMetadata.COMPATIBLE_METADATA_VERSION.take(2) == listOf(1, 8)) {
-                    metadataVersion = "1.9"
-                }
             }
         }
         val exitCode = compiler.exec(messageCollector, Services.EMPTY, args)