feat: add new ci script for docker builds

This script will be used by prow to test our docker builds that are an
essential part of the release the process.

We have encountered an issue where we aren't testing the different
architectures.

Signed-off-by: Richard Case <richard.case@suse.com>

scripts/ci-docker-build.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# Copyright 2024 The Kubernetes Authors.
+#
+# 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 nounset
+set -o pipefail
+
+REPO_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
+# shellcheck source=../hack/ensure-go.sh
+source "${REPO_ROOT}/hack/ensure-go.sh"
+
+cd "${REPO_ROOT}" && make docker-build-all release-binaries