Deprecate tailRecursive in favor of tailrec

compiler/testData/codegen/box/diagnostics/functions/tailRecursion/thisReferences.kt

@@ -1,17 +1,17 @@
 class A {
-    tailRecursive fun f1(c : Int) {
+    tailrec fun f1(c : Int) {
         if (c > 0) {
             this.f1(c - 1)
         }
     }
 
-    tailRecursive fun f2(c : Int) {
+    tailrec fun f2(c : Int) {
         if (c > 0) {
             f2(c - 1)
         }
     }
 
-    <!NO_TAIL_CALLS_FOUND!>tailRecursive fun f3(a : A)<!> {
+    <!NO_TAIL_CALLS_FOUND!>tailrec fun f3(a : A)<!> {
         a.<!NON_TAIL_RECURSIVE_CALL!>f3<!>(a) // non-tail recursion, could be potentially resolved by condition if (a == this) f3() else a.f3()
     }
 }