feat: Add keda helm chart

[mglotov]

Prerequisites

Please answer the following questions for yourself before submitting an issue. YOU MAY DELETE THE PREREQUISITES SECTION.

• I am running the latest version
• I checked the documentation and found no answer
• I checked to make sure that this issue has not already been filed

Expected Behavior

It'd be better to have keda installation in this repository

Current Behavior

There isn't keda (https://keda.sh/) helm_release here