Include Deprecation Notice

[jaredpetersen]

I started using this Helm chart before realizing that it's deprecated according to the documentation:

Warning:
The CockroachDB Helm chart is compatible with Kubernetes versions 1.22 and earlier (the latest version as of this writing). However, no new feature development is currently planned. If you are experiencing issues with a Helm deployment on production, contact our Support team.

There should be a notice on this repository too so that people know to switch to the Operator for any new projects.

[worldofgeese]

Later in the documentation it is stated that the team will notify on deprecation. A new chart version was just released on the 5th of December 2022.

This is outside the scope of your issue but I'd prefer to see the chart converted to install the CRDB operator rather than outright deprecation (whenever that occurs). There are many examples in the wild of this.