[Test] Temporarily disable actor_counters on asan.

rdar://problem/72439642
(cherry picked from commit 2df9910)

Author: nate-chandler

test/Concurrency/Runtime/actor_counters.swift

@@ -4,6 +4,9 @@
 // REQUIRES: concurrency
 // REQUIRES: libdispatch
 
+// Remove with rdar://problem/72439642
+// UNSUPPORTED: asan
+
 #if canImport(Darwin)
 import Darwin
 #elseif canImport(Glibc)