Improvements list for docs

[antejavor]

• Separate all charts into individual pages: https://memgraph.com/docs/getting-started/install-memgraph/kubernetes
• For each chart, highlight how they can be configured from values.yaml, the most critical configuration options
• Standalone
  • Standalone secretes setup
  • Affinity setup
  • Volumes setup (delete, change, expansion etc.)
  • Init containers
  • Storage class
• HA chart
  • Affinity setup
  • Services and reverse proxy
  • The rest of the things are the same as for standalone
• LAB charts need to be explained in context how it connects to Memgraph automatically and how to configure deployment based on this + configuration options

Docs should be cloud provider agnostic.

[as51340]

HA docs will be solved with #104 and memgraph/documentation#1104.