Add tags to skip some tests under UBSAN.

PiperOrigin-RevId: 758783019
Change-Id: I3b5d6a7cce9a001a7dbc3edb9dd5c7e9132b33dd

Author: goldvitaly

absl/hash/BUILD.bazel

@@ -82,6 +82,8 @@ cc_test(
     ],
     copts = ABSL_TEST_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
+    # TODO(b/417700722): Fix HashValueTest.PointerAlignment reporting more collisions under ubsan.
+    tags = ["noubsan"],
     deps = [
         ":hash",
         ":hash_testing",

absl/synchronization/BUILD.bazel

@@ -360,6 +360,7 @@ cc_test(
     linkopts = ABSL_DEFAULT_LINKOPTS,
     tags = [
         "no_test_wasm",
+        "noubsan",  # TODO(b/417700722):  timeouts under UBSAN.
     ],
     deps = [
         ":per_thread_sem_test_common",