[Feature Request] Allow customizing Ingress rules with pass-through variables

[FecoDoo]

It would be great if one can have the ability to fully customzing Ingress resource with https://github.com/litmuschaos/litmus-helm/tree/master/charts/litmus chart.

According to docs we need both litmusportal-server-service and litmusportal-frontend-service backends, but with the Helm chart, only the front service backend rule will be created.