Investigate how we can leverage tags on the dependencies to toggle chart features

[marcofranssen]

See: https://helm.sh/docs/topics/charts/#tags-and-condition-fields-in-dependencies

Using tags we can conditionally toggle certain features. This might be a good feature to use when toggling features that require a combination of dependencies.

E.g. spire-agent requires spiffe-csi-driver or the nested setup requires another instance of X.

Lets, design/workout a couple of usecases in the context of this chart in this issue. So we can shape our thoughts on the API design as well see if there will be any benefits for us utilizing this feature.