Add tests for obsolete issues

#KT-12126
 #KT-12189
 #KT-23628
 #KT-24209
 #KT-34338
 #KT-47279
 #KT-48498

compiler/testData/codegen/boxInline/delegatedProperty/kt48498.kt

@@ -0,0 +1,18 @@
+// FILE: 1.kt
+
+package x
+
+operator fun String.provideDelegate(thisRef: Any?, prop: Any?) = this
+
+operator fun String.getValue(thisRef: Any?, prop: Any?) = this
+
+inline fun foo(): String {
+    val x by "OK"
+    return x
+}
+
+// FILE: 2.kt
+
+import x.*
+
+fun box(): String = foo()