Skip sporadically failing tests (#12589)

src/tests/functional/plugin/gpu/shared_tests_instances/skip_tests_config.cpp

@@ -96,5 +96,7 @@ std::vector<std::string> disabledTestPatterns() {
             // Issue: CVS-88667 - Need to verify hetero interoperability
             R"(.*nightly_OVClassHeteroExecutableNetworlGetMetricTest.*SUPPORTED_(CONFIG_KEYS|METRICS).*)",
             R"(.*VirtualPlugin.*BehaviorTests.*OVHoldersTest.*LoadedTensor.*target_device=AUTO.*)",
+            // TODO: Issue: 89555
+            R"(.*CoreThreadingTests.*smoke.*Network.*)",
     };
 }