Feature: have possibility to install VictoriaMetrics instead of Prometheus

[mglotov]

Prerequisites

Please answer the following questions for yourself before submitting an issue.

• 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

I want to have the possibility of what to install: VictoriaMetrics or Prometheus (where VictoriaMetrics is a default solution)

Current Behavior

The repository doesn't contain VictoriaMetrics helm_release.