[BUG]: Non default ingress class name

[zhenyatsk]

Description of the bug

kubernetes.io/ingress.class is an old way to assign ingress to specific ingress class but in newer versions there is a special attribute ingressClassName.

chart implemented both ways but kubernetes.io/ingress.class has hardcoded value, so it is not possible to use non default ingress class name.

Steps To Reproduce

1. deploy ingress with non default class name.
2. try to deploy keep hq using this chart.

Additional Information

to fix this need to change kubernetes.io/ingress.class: "nginx" to kubernetes.io/ingress.class: "{{ .Values.global.ingress.className }}"