Support templates in ingress hostname and ingressClassName

[yahel2410]

Also added to extraHosts. Tested that it renders with these values:

---
# values.yaml 
ingress:
  enabled: true
  path: /(api/marketplace.*)$
  hostname: "{{ .Values.global.apiHost }}"
  ingressClassName: "{{ .Values.global.ingressClassName }}"
  tls: true
  selfSigned: true
  extraHosts:
    - name: "{{ .Values.global.apiHost }}-2"
      path: /

---
# global.yaml
global:
  apiHost: "foo.bar.com"
  ingressClassName: "nginx"

[atkrad]

@yahel2410 Thanks for your contribution.

Please update the version and the appVersion fields in the Chart.yaml file:

version: "0.9.0"
appVersion: "0.9.0"

[yahel2410]

@atkrad Thanks for the quick reply. Done