Cleanup, Fixes and Review Feedback

Includes mix fixes like:
- Fixing the documentation
- Making sure device and storage mounts work correctly
- Fixing broken things that where supposed to work according to the PR highlights
- Moving some additional things to TrueCharts based containers
- Hiding, changing and reordening some bad UI elements
- Adding support for supplementalGroup permissions

Co-authored-by: Dan Sheridan <dan.sheridan@postman.org.uk>
Co-authored-by: Stavros Kois <47820033+stavros-k@users.noreply.github.com>
Co-authored-by: Justin Clift <justin@postgresql.org>

docs/development/storage.md

@@ -60,6 +60,7 @@ Preventing the user to disable them, ensures that users don't (by mistake) remov
                   default: "config"
                   required: true
                   editable: false
+                  hidden: true
               - variable: mountPath
                 label: "Mount Path"
                 description: "Path to mount inside the pod"