Add tests for Obsolete issues

#KT-18977 Obsolete

compiler/testData/codegen/boxInline/anonymousObject/kt15751.kt

@@ -1,5 +1,7 @@
 // FILE: 1.kt
 // NO_CHECK_LAMBDA_INLINING
+package test
+
 class A {
     val foo = fun(call: () -> Unit) =
         ext {
@@ -24,6 +26,7 @@ class A {
 }
 
 // FILE: 2.kt
+import test.*
 
 fun box(): String {
     var result = "fail"

compiler/testData/codegen/boxInline/callableReference/kt15751_2.kt

@@ -1,6 +1,8 @@
 // FILE: 1.kt
 // IGNORE_BACKEND: JS
 // WITH_RUNTIME
+package test
+
 public inline fun <T> T.myalso(block: (T) -> Unit): T {
     block(this)
     return this
@@ -12,6 +14,8 @@ public inline fun <T, R : Any> Iterable<T>.mymapNotNull(transform: (T) -> R?): L
 
 // FILE: 2.kt
 // NO_CHECK_LAMBDA_INLINING
+import test.*
+
 var result = -1;
 
 fun box(): String {

compiler/testData/codegen/boxInline/nonLocalReturns/tryFinally/kt16417.kt

@@ -1,5 +1,7 @@
 // IGNORE_BACKEND: JVM_IR
 // FILE: 1.kt
+package test
+
 class A {
     var field = 0
 
@@ -28,6 +30,9 @@ class A {
 
 // FILE: 2.kt
 // NO_CHECK_LAMBDA_INLINING
+
+import test.*
+
 fun box(): String {
     val a = A()
     a.c ({ "OK" })

compiler/testData/codegen/boxInline/reified/kt18977.kt

@@ -0,0 +1,26 @@
+// FILE: 1.kt
+package test
+
+class AbstractTreeNode<T>(val value: T, val parent: AbstractTreeNode<T>?)
+
+internal inline fun <reified T : Any> AbstractTreeNode<*>.findNotNullValueOfType(strict: Boolean = false): T {
+    return findValueOfType(strict)!!
+}
+
+internal inline fun <reified T : Any> AbstractTreeNode<*>.findValueOfType(strict: Boolean = true): T? {
+    var current: AbstractTreeNode<*>? = if (strict) this.parent else this
+    while (current != null) {
+        val value = current.value
+        if (value is T) return value
+        current = current.parent
+    }
+    return null
+}
+
+// FILE: 2.kt
+
+import test.*
+
+fun box(): String {
+    return AbstractTreeNode("OK", null).findNotNullValueOfType<String>()!!
+}