feat(helm): added ingress pathType

[rathberm]

As mentioned in #1534 the ingress pathType was hardcoded to ImplementationSpecific, which is not optimal in every environment. I tried to make it possible to change the pathType in the values file. What do you think?

I'm using the default template function here as to not break existing setups.

[rathberm]

I just saw #1508 where this was discussed too and realized that $ingressPaths is a list of Paths which all need their separate pathType. As it was already mentioned here I don't see an easy way to solve that.

With my current solution multiple paths like this:

  paths:
    - /
    - /ui

will lead to a resource like this:

          - path: /
            pathType: ImplementationSpecific
            backend:
              service:
                name: release-name-akhq
                port:
                  name: http

          - path: /ui
            pathType: ImplementationSpecific
            backend:
              service:
                name: release-name-akhq
                port:
                  name: http

Every path will always have the same pathType, which is the same in the current stat on the master but with my fix you will be able to atleast change the pathType.

[tchiotludo]

let's try if it sufficient, since it don't break things.

THanks for the PR