JVM_IR: do not deep-copy suspend lambdas in initializers

This loses reflection metadata (and also sometimes fails). Which was
missing anyway - this is also fixed now.

 #KT-42554 Fixed

compiler/testData/codegen/box/reflection/lambdaClasses/reflectOnSuspendLambdaInField.kt

@@ -0,0 +1,12 @@
+// TARGET_BACKEND: JVM
+// WITH_REFLECT
+
+import kotlin.reflect.jvm.reflect
+
+class C {
+    val x: suspend (String) -> Unit = { OK: String -> }
+}
+
+fun box(): String {
+    return C().x.reflect()?.parameters?.singleOrNull()?.name ?: "null"
+}