test: set test-http2-large-file as flaky

PR-URL: #54802
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matthew Aitken <maitken033380023@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>

Author: anonrig

test/sequential/sequential.status

@@ -19,6 +19,8 @@ test-http-max-sockets: PASS, FLAKY
 # https://github.com/nodejs/node/issues/49630
 test-single-executable-application-snapshot: PASS, FLAKY
 test-single-executable-application-snapshot-and-code-cache: PASS, FLAKY
+# https://github.com/nodejs/node/issues/47409
+test-http2-large-file: PASS, FLAKY
 
 [$system==linux]