build/ci: mark supervisor and e2e tests as flaky

Change-Id: I56459eac238d3ecc5c8429226cab1c32ceb2e0c4
Reviewed-on: https://review.monogon.dev/c/monogon/+/1088
Tested-by: Jenkins CI
Reviewed-by: Serge Bazanski <serge@monogon.tech>
diff --git a/metropolis/test/e2e/BUILD.bazel b/metropolis/test/e2e/BUILD.bazel
index 6cc0ab7..2d227e1 100644
--- a/metropolis/test/e2e/BUILD.bazel
+++ b/metropolis/test/e2e/BUILD.bazel
@@ -27,6 +27,8 @@
         "//third_party/edk2:firmware",
     ],
     embed = [":e2e"],
+    # TODO: https://github.com/monogon-dev/monogon/issues/170
+    flaky = True,
     rundir = ".",
     deps = [
         "//metropolis/node",