Enable lightweight lambdas (aka invokedynamic) since 2.0

#KT-45375 Fixed
 #KT-58173 Open

libraries/kotlinx-metadata/jvm/test/kotlinx/metadata/test/MetadataSmokeTest.kt

@@ -212,7 +212,7 @@ class MetadataSmokeTest {
     fun testDisplayNameSample() {
         class A {}
 
-        val b: (Int) -> Int = fun(x: Int) = x
+        val b: (Int) -> Int = @JvmSerializableLambda fun(x: Int) = x
 
         assertEquals("Class .kotlinx/metadata/test/MetadataSmokeTest\$testDisplayNameSample\$A", displayName(A::class.java.getMetadata()))
         assertEquals("Lambda <no name provided>", displayName(b::class.java.getMetadata()))

libraries/kotlinx-metadata/jvm/test/kotlinx/metadata/test/WritersContractTest.kt

@@ -15,7 +15,7 @@ import kotlin.test.assertFailsWith
 
 class WritersContractTest {
     val classMd = WritersContractTest::class.java.getMetadata()
-    val l: () -> Unit = {}
+    val l: () -> Unit = @JvmSerializableLambda {}
     val lambdaMd = l::class.java.getMetadata()
     val fileFacadeMd = Class.forName("kotlinx.metadata.test.testdata.FileFacade").getMetadata()
     val multiFileFacadeMd = Class.forName("kotlinx.metadata.test.testdata.MultiFileClassFacade").getMetadata()