Update the Operator emblem and use it in README (#384)

Co-authored-by: Viacheslav Sarzhan <[email protected]>

Author: fiowro

README.md

@@ -1,5 +1,7 @@
 # Percona Operator for MySQL
 
+![Percona Kubernetes Operators](kubernetes.svg)
+
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 ![Docker Pulls](https://img.shields.io/docker/pulls/percona/percona-server-mysql-operator)
 ![Docker Image Size (latest by date)](https://img.shields.io/docker/image-size/percona/percona-server-mysql-operator)