Description of problem:
Pass down proxy env to operands failed for go type operator as the description : https://github.com/operator-framework/enhancements/blob/master/enhancements/proxy-passdown.md. Import the proxy package to the controller.go. But the proxy is not released ,can't be used for controller.go

Version-Release number of selected component (if applicable):
operator-sdk version: "v1.10.1-ocp", commit: "972fd59bb3a4cdb2e5102fc37fc3afa32f6c066f", kubernetes version: "v1.21", go version: "go1.16.5", GOOS: "linux", GOARCH: "amd64"

How reproducible:
always


Steps to Reproduce:
1.generate a go operator as https://docs.openshift.com/container-platform/4.8/operators/operator_sdk/golang/osdk-golang-tutorial.html
import the proxy package to the controller.go. But the proxy is not released ,can't be used for controller.go

$cat controllers/memcached_controller.go

package controllers

import (

proxy "github.com/operator-framework/operator-lib/proxy"

)

proxyVars := proxy.ReadProxyVarsFromEnv()
for _, container := range dep.Spec.Template.Spec.Containers
{ container.Env = append(container.Env, proxyVars) } 

2.$ go get github.com/operator-framework/operator-lib/proxy


Actual results:
$ go get github.com/operator-framework/operator-lib/proxy
go get: module github.com/operator-framework/operator-lib@upgrade found (v0.6.0), but does not contain package github.com/operator-framework/operator-lib/proxy


Expected results:
proxy package can be imported and function ReadProxyVarsFromEnv can get the env.http_proxy and append it to all the containers.


Additional info: