Add tests for obsolete issues

#KT-38092 Obsolete
 #KT-38179 Obsolete
 #KT-35105 Obsolete
 #KT-36696 Obsolete
 #KT-36947 Obsolete
 #KT-37337 Obsolete
 #KT-37309 Obsolete
 #KT-37727 Obsolete
 #KT-37735 Obsolete
 #KT-37853 Obsolete
 #KT-37920 Obsolete
 #KT-37709 Obsolete
 #KT-37706 Obsolete

compiler/testData/diagnostics/testsWithStdLib/regression/kt37706.kt

@@ -0,0 +1,5 @@
+fun test(): Int {
+    val sets = (1..100).associateWith { (it..10 * it).mapTo(java.util.TreeSet()) { i -> i } }
+    val set = sets[50] ?: emptySet()
+    return set.size
+}