fixup! fixup! fixup! streaming: Add DAG teardown option

Author: jpsamaroo

test/streaming.jl

@@ -205,7 +205,7 @@ for idx in 1:5
             @test istaskdone(x)
             fetch(x)
         end
-        @test test_finishes("teardown=false"; max_evals=1_000_000, ignore_timeout=true) do
+        @test !test_finishes("teardown=false"; max_evals=1_000_000, ignore_timeout=true) do
             local x, y
             Dagger.spawn_streaming(;teardown=false) do
                 x = Dagger.@spawn scope=rand(scopes) () -> begin