feat(e2e): add a script to run tests

scripts/e2e.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# Copyright 2016 The Kubernetes Authors All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit
+set -o pipefail
+[[ "$TRACE" ]] && set -x
+
+HELM_ROOT="${BASH_SOURCE[0]%/*}/.."
+cd "$HELM_ROOT"
+
+go test -v ./test/e2e -tags e2e
+
+exit 0