Skip Auditbeat test_non_recursive on Darwin on CI (elastic#24679)

Closes: elastic#24678
(cherry picked from commit 355355b)

auditbeat/tests/system/test_file_integrity.py

@@ -1,5 +1,6 @@
 import time
 import unittest
+import platform
 from auditbeat import *
 
 
@@ -61,6 +62,8 @@ def wait_output(self, min_events):
             else:
                 break
 
+    @unittest.skipIf(os.getenv("BUILD_ID") is not None and platform.system() == 'Darwin',
+                     'Flaky test: https://github.com/elastic/beats/issues/24678')
     def test_non_recursive(self):
         """
         file_integrity monitors watched directories (non recursive).
@@ -130,7 +133,7 @@ def test_non_recursive(self):
             # assert file inside subdir is not reported
             assert self.log_contains(file3) is False
 
-    @unittest.skip("Skipped as flaky: https://github.com/elastic/beats/issues/7731")
+    @unittest.skipIf(os.getenv("BUILD_ID") is not None, "Skipped as flaky: https://github.com/elastic/beats/issues/7731")
     def test_recursive(self):
         """
         file_integrity monitors watched directories (recursive).