Refactored README badges (#931)

* chore(README): removed obsolete badges

We transitioned from docker.io to ghcr.io and from
CircleCI to GHA so those badges are not relevant
anymore.

* chore(README): refactored badges

Added CI and image.
Added Go version and released version and date.

---------

Co-authored-by: Darren Lau <[email protected]>

Author: pregnor

README.md

@@ -1,20 +1,22 @@
 <p align="center">
 
-  <a href="https://hub.docker.com/r/banzaicloud/kafka-operator/">
-    <img src="https://img.shields.io/docker/cloud/automated/banzaicloud/kafka-operator.svg" alt="Docker Automated build">
-  </a>
+![Koperator](https://img.shields.io/github/v/release/banzaicloud/koperator?label=Koperator&sort=semver)
+![Released](https://img.shields.io/github/release-date/banzaicloud/koperator?label=Released)
+![License](https://img.shields.io/github/license/banzaicloud/koperator?label=License)
+![Go version (latest release)](https://img.shields.io/github/go-mod/go-version/banzaicloud/koperator/v0.22.0)
 
-  <a href="https://circleci.com/gh/banzaicloud/koperator">
-    <img src="https://circleci.com/gh/banzaicloud/koperator/tree/master.svg?style=shield" alt="CircleCI">
-  </a>
+</p>
+
+---
 
-  <a href="https://goreportcard.com/report/github.com/banzaicloud/koperator">
-    <img src="https://goreportcard.com/badge/github.com/banzaicloud/koperator" alt="Go Report Card">
-  </a>
+<p align="center">
 
-  <a href="https://github.com/banzaicloud/koperator/">
-    <img src="https://img.shields.io/badge/license-Apache%20v2-orange.svg" alt="license">
-  </a>
+![Go version](https://img.shields.io/github/go-mod/go-version/banzaicloud/koperator/master)
+[![Go Report Card](https://goreportcard.com/badge/github.com/banzaicloud/koperator)](https://goreportcard.com/report/github.com/banzaicloud/koperator)
+![CI](https://img.shields.io/github/actions/workflow/status/banzaicloud/koperator/ci.yml?branch=master&label=CI)
+![Image](https://img.shields.io/github/actions/workflow/status/banzaicloud/koperator/docker.yml?branch=master&label=Image)
+![Image (perf test)](https://img.shields.io/github/actions/workflow/status/banzaicloud/koperator/docker_perf_test_load.yml?branch=master&label=Image%20%28perf%20test%29)
+![Helm chart](https://img.shields.io/github/actions/workflow/status/banzaicloud/koperator/helm.yml?branch=master&label=Helm%20chart)
 
 </p>