POC HB: Client auth when creating Helm release

[PK85]

Description

POC with working solution where user with proper rights can provision redis addon.

Reasons

This will be Input for impl issue: #67

AC
Demo for:

• usecase 1: user with proper rights can provision redis addon
• usecase 2: user with lack of resource permission cannot successfuly provision redis addon
• usecase 3: check technical accounts to provision redis addon
  • service account (groups?)

[polskikiel]

I checked the ServiceInstance status when the user doesn't have proper permissions to provision some service (with async provisioning).

The SI status looks like:

The above error status contains many errors.Wrap() and its message could be simplified. With the errors.Cause() we should be able to indicate if an error is NotForbidden type using errors.IsForbidden().

UP:

I created a PR to improve the error message, with my changes it looks like it: