fix: don't require free-threaded python tests to pass #845
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Over in #844, free-threaded python tests are causing
complete-prnot to run becausemsgspechasn't released a version that supports it yet. This highlights the fact that free-threading is not officially supported in Taskgraph yet, so we shouldn't block other tasks on these tests.I could be convinced that we should just disable these tests completely in the meantime if having permafail tests is too annoying.