m/t/e2e: move testEventual to common test util pkg

testEventual, among other implementation, will be reused in metroctl
tests.

Change-Id: I24df31a72034b707e3906889e7a569c8e97669ad
Reviewed-on: https://review.monogon.dev/c/monogon/+/788
Tested-by: Jenkins CI
Reviewed-by: Lorenz Brun <lorenz@monogon.tech>
diff --git a/metropolis/test/util/BUILD.bazel b/metropolis/test/util/BUILD.bazel
new file mode 100644
index 0000000..7caf53b
--- /dev/null
+++ b/metropolis/test/util/BUILD.bazel
@@ -0,0 +1,8 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_library")
+
+go_library(
+    name = "util",
+    srcs = ["runners.go"],
+    importpath = "source.monogon.dev/metropolis/test/util",
+    visibility = ["//metropolis:__subpackages__"],
+)