Helm chart: Update MongoDB chart dependency to 13.x (MongoDB 6)

[calohmn]

In the ditto Helm chart, the mongoDB chart dependency is set to version ^12.x, the latest version to match that being 12.1.31.
That version uses the bitnami common chart version 1.16.1.

With bitnami common chart version 2.9.0, there has been an incompatible change in the common.labels.standard named template.
This means, that when using the ditto chart together with another bitnami chart that uses the common chart >= 2.9 (e.g. the newest Kafka chart), there may be an error like

template: cloud2edge/charts/hono/charts/kafka/templates/rbac/serviceaccount.yaml:12:14: 
executing "cloud2edge/charts/hono/charts/kafka/templates/rbac/serviceaccount.yaml" at <include "common.labels.standard" (dict "customLabels" .Values.commonLabels "context" $)>: 
error calling include: template: cloud2edge/charts/ditto/charts/mongodb/charts/common/templates/_labels.tpl:6:27: 
executing "common.labels.standard" at <include "common.names.name" .>: 
error calling include: template: cloud2edge/charts/ditto/charts/mongodb/charts/common/templates/_names.tpl:6:18: 
executing "common.names.name" at <.Chart.Name>: nil pointer evaluating interface {}.Name

(see also bitnami/charts#19417).

The above error is from testing the Eclipse IoT Packages cloud2edge chart with the upcoming Hono Helm chart version which references Kafka chart version 26.8.4 (see eclipse/packages#523).

The solution here would be to update the mongoDB chart dependency in the ditto chart to at least 13.17.0 (or more generally ^13.x, meaning 13.18.5).

This would mean using a MongoDB 6 image though, the question there being whether ditto supports that version (https://eclipse.dev/ditto/installation-running.html#start-ditto only lists 5.0 as latest supported version).

[thjaeckle]

@kalinkostashki @alstanchev could you run the Ditto System-Tests against MongoDB 6.0 so that we can verify if this completely works?
I would assume so, but only update the dependency in the chart if we can verify that :)

[alstanchev]

@thjaeckle Tests look good running with mongo 6.0

[thjaeckle]

@alstanchev cool - could we then bump the mongo version used in ditto-tests permantently to MongoDB 6.0?
And we can also bump the bitnami mongoDB dependency to ^13.x

I can provide that once I come to it ..

[alstanchev]

I don't see any reason not to.