Rewrite with stateful sets (#68)

## Description

Fixes #38 
*Please add a description here. This will become the commit message of the merge request later.*



Co-authored-by: Stacky McStackface <[email protected]>
Co-authored-by: Stacky McStackface <[email protected]>

Author: razvan

.github/dependabot.yml

@@ -2,6 +2,7 @@
 # This file is automatically generated from the templates in stackabletech/operator-templating
 # DON'T MANUALLY EDIT THIS FILE
 # =============
+---
 version: 2
 updates:
   - package-ecosystem: "github-actions"

.github/pull_request_template.md

@@ -10,5 +10,6 @@
 - [ ] Documentation added (or not applicable)
 - [ ] Changelog updated (or not applicable)
 - [ ] Cargo.toml only contains references to git tags (not specific commits or branches)
+- [ ] Helm chart can be installed and deployed operator works (or not applicable)
 
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