Add a script to help with bumping dependencies

Author: cbandy

go.mod

@@ -1,5 +1,6 @@
 module github.com/crunchydata/postgres-operator
 
+// If this is changing when you don't want it to, see hack/go-get.sh
 go 1.22.7
 
 require (

hack/go-get.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+#
+# Copyright 2025 Crunchy Data Solutions, Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# This runs `$GO get` without changing the "go" directive in the "go.mod" file.
+# To change that, pass a "go@go{version}" argument.
+#
+# https://go.dev/doc/toolchain
+#
+# Usage: $0 help
+# Usage: $0 -u golang.org/x/crypto
+# Usage: $0 -u golang.org/x/crypto go@go1.99.0
+#
+
+set -eu
+: "${GO:=go}"
+
+if [[ "$#" -eq 0 ]] || [[ "$1" == 'help' ]] || [[ "$*" == *'--help'* ]] || [[ "$*" == *'--version'* ]]
+then
+	self=$(command -v -- "$0")
+	content=$(< "${self}")
+	content="${content%%$'\n\n'*}"
+	content="#${content#*$'\n#'}"
+	content="${content//$'$GO'/${GO}}"
+	exec echo "${content//$'$0'/$0}"
+fi
+
+version=$(${GO} list -m -f 'go@go{{.GoVersion}}')
+
+for arg in "$@"
+do case "${arg}" in go@go*) version="${arg}" ;; *) esac
+done
+
+${GO} get "$@" "${version}" 'toolchain@none'
+${GO} mod tidy