Temporarily disable test_cinderx.test_parallel_gc

Summary: This is failing intermittently, let's get our signal healthy again.

Reviewed By: mpage

Differential Revision: D85868424

fbshipit-source-id: 1ff3014600fbddf652cbf1e9032824eea235d94e

Author: DinoV

cinderx/TestScripts/cinder_skip_test_314.txt

@@ -3,3 +3,6 @@ test.test_perf_profiler.TestPerfTrampoline.test_trampoline_works
 
 # This test hits a deprecation warning about forking in a multi-threaded process
 test.test_threading.ThreadTests.test_native_id_after_fork
+
+# This is currently intermittently failing (T243385914)
+test_cinderx.test_parallel_gc.*