Migrating from 0.10.x to 0.17.1

[bhavin192]

I was able to successfully migrate from 0.10.x to 0.17.1, all thanks to the great migrations docs 🎉
There are few minor issues/changes/typos here and there, just trying to list all of them here, once discussed I can raise PR for those changes or create individual issues.

Feature Request

0.10.x --> 0.11.x

• I had to remove an import from tools.go as the package no longer exist in sigs.k8s.io/controller-tools@v0.2.0

github.com/yugabyte/yugabyte-k8s-operator imports
	sigs.k8s.io/controller-tools/pkg/crd/generator: module sigs.k8s.io/controller-tools@latest found (v0.3.0), but does not contain package sigs.k8s.io/controller-tools/pkg/crd/generator

File: tools.go

 // +build tools
 
 package tools
-
-import (
-	_ "sigs.k8s.io/controller-tools/pkg/crd/generator"
-)

0.12.0 --> 0.13.0

• There is typo in go.mod related details, it should be v0.13.0 instead of v0.13.1. Raising PR for this right away. Ref: go test: mod flag may be set only once #2556 (comment)

0.14.x

• Steps to add addMetrics() function. More about this in 0.16.x.

0.15.x

• The version v0.15.2 is available, so we can ask users to use it directly instead of v0.15.1. Raising PR for this.

0.16.x

• 1. Typo: cmd/main.go should be cmd/manager/main.go. Raising PR for this.
• 2. I didn't have addMetrics() function as I came from 0.10.x, it was added in 0.14.x 81c6c8a.
• 3. Should we mention PR Scaffold code in cmd/manager/main.go for Go operators and add logic to Ansible/Helm operators to handle [multinamespace caching] #2522 as well as it's also part of the 0.16.0 release and adds support for multiple namespaces.

0.17.x

• We can update the version from go.mod to v0.17.1 instead of v0.17.0. Raising PR for this.

[estroz]

Thanks for making PR's for version bumps/typos. Feel free to make another one to add anything else missing!

/kind documentation