Skip securityhub_insights system tests to avoid fleet health degradation due to empty template values

Author: kcreddy

packages/aws/data_stream/securityhub_insights/_dev/test/system/test-default-config.yml

@@ -33,3 +33,6 @@ data_stream:
           8gqQdAH8DCmCSwT/6JRLbDCCM7njqzGLb3d/hGdZYxVp+Bu0vbuE4BnifTvo79az
           IqZhWKmJamAm8bHDYVR+QPo7JWkPf117I3YORE3NSC1dfvXk1jOCl+zA7A==
           -----END CERTIFICATE-----
+skip:
+  reason: "The fleet health status changes to degraded when the HTTPJSON template's value evaluation comes up empty, which leads to system test failures but does not interrupt the data flow."
+  link: https://github.com/elastic/beats/issues/45664