[arm64][asan] Add missing CLEANUP to test

Found while testing with asan.

Change-Id: I82529422770653535aae148a4acc6089c5a4fee7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1844786
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Martyn Capewell <martyn.capewell@arm.com>
Cr-Commit-Position: refs/heads/master@{#64136}

test/cctest/test-disasm-arm64.cc

@@ -1888,6 +1888,8 @@ TEST(system_pauth) {
   COMPARE(paciasp(), "paciasp");
   COMPARE(autia1716(), "autia1716");
   COMPARE(autiasp(), "autiasp");
+
+  CLEANUP();
 }
 
 TEST_(debug) {