Add option in "values.yaml" for Affinity, Tolerations, and Priorityclassname

[Neumann-Nils]

Description

This PR allows the following values to be defined under key setup in the values.yaml:

0. podAntiAffinityWeight - single value. For example:

   podAntiAffinityWeight: 100

1. affinity - fully customizable. For example:

   affinity:
   podAffinity:
     requiredDuringSchedulingIgnoredDuringExecution:
     - labelSelector:
         matchExpressions:
         - key: security
           operator: In
           values:
           - S1
       topologyKey: failure-domain.beta.kubernetes.io/zone

2. priorityClassName - single value. For example:

   priorityClassName: high-priority

3. tolerations - fully customizable. For example:

   tolerations:
   - key: "example-key"
   operator: "Exists"
   effect: "NoSchedule

These changes does not change the default behavior, but gives the user more flexibility in adapting the Karydia deployment.

Checklist

Before submitting this PR, please make sure:

• [x] your code builds clean with make
• [x] your code lets succeed unit tests with make test
• [x] your code lets succeed integration tests