[Sanitizer] Disable tests that depend on symbolication on watchOS

Some new Sanitizer tests are failing on watchOS because we fail to start
atos to symbolicate the report.  FileCheck then fails when we assert on
the generated report.

Radar-Id: rdar://75766734

Author: Julian Lettner

test/Sanitizers/symbolication.swift

@@ -5,6 +5,9 @@
 // REQUIRES: asan_runtime
 // REQUIRES: VENDOR=apple
 
+// rdar://75365575 (Failing to start atos external symbolizer)
+// UNSUPPORTED: OS=watchos
+
 // We copy the binary but not the corresponding .dSYM for remote runs (e.g.,
 // on-device testing), and hence online symbolication fails.
 // UNSUPPORTED: remote_run

test/Sanitizers/tsan/racy_actor_counters.swift

@@ -7,6 +7,9 @@
 // REQUIRES: libdispatch
 // REQUIRES: tsan_runtime
 
+// rdar://75365575 (Failing to start atos external symbolizer)
+// UNSUPPORTED: OS=watchos
+
 var globalCounterValue = 0
 
 actor Counter {

test/Sanitizers/tsan/racy_async_let_fibonacci.swift

@@ -7,6 +7,9 @@
 // REQUIRES: libdispatch
 // REQUIRES: tsan_runtime
 
+// rdar://75365575 (Failing to start atos external symbolizer)
+// UNSUPPORTED: OS=watchos
+
 #if canImport(Darwin)
 import Darwin
 #elseif canImport(Glibc)