Allow nodeSelector to helm chart

[jazark]

Hi,

We're currently using this helm chart and will be deploying a productionized version. I'm requesting the nodeSelector be added to the values.yaml, api statefulset, and frontend api deployment spec. I've ran a helm template and have verified this works as intended and is a non breaking change. Simply add the following:

1. Add nodeSelector: {} to values.yaml:
   https://github.com/DependencyTrack/helm-charts/blob/main/charts/dependency-track/values.yaml#L66
   https://github.com/DependencyTrack/helm-charts/blob/main/charts/dependency-track/values.yaml#L134

2. Add the following conditional to frontend deployment

  {{- if .Values.frontend.nodeSelector }}
  nodeSelector:
  {{- toYaml .Values.frontend.nodeSelector | nindent 8 }}
  {{- end }}

https://github.com/DependencyTrack/helm-charts/blob/main/charts/dependency-track/templates/frontend/deployment.yaml#L93

3. Add the following conditional to api stateful-set

  {{- if .Values.apiServer.nodeSelector }}
  nodeSelector:
  {{- toYaml .Values.apiServer.nodeSelector | nindent 8 }}
  {{- end }}

https://github.com/DependencyTrack/helm-charts/blob/main/charts/dependency-track/templates/api-server/statefulset.yaml#L108

Thanks and let me know if any questions!