hack: update golangci-lint verify scripts

Instead of invoking verify-golangci-lint.sh directly from Prow jobs,
those Prow jobs should use "make verify WHAT=...". The advantage is
that the common code for running verify targets will be used, which
includes producing JUnit files.

Providing simple wrappers for strict linting of PRs (=
verify-golangci-lint-pr.sh) and event stricter linting of PRs with hints
enabled (= verify-golangci-lint-pr-hints.sh) enables those WHAT targets.

hack/verify-golangci-lint-pr-hints.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+
+# Copyright 2022 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.
+
+# This script checks a PR for the coding style for the Go language files using
+# golangci-lint. It does nothing when invoked as part of a normal "make
+# verify".
+
+set -o nounset
+set -o pipefail
+
+if [ ! "${PULL_NUMBER:-}" ]; then
+  echo 'Not testing anything because this is not a pull request.'
+  exit 0
+fi
+
+KUBE_ROOT=$(dirname "${BASH_SOURCE[0]}")/..
+
+"${KUBE_ROOT}/hack/verify-golangci-lint.sh" -r "${PULL_BASE_SHA}" -n