We currently ignore the spec.addons.<addon>.install.service.ingress.contextPath field for grafana and prometheus add-ons. This issue is about implementing it.

From https://docs.google.com/document/d/13Z7IPQRXVIWGpFzqU9woRT_nr1bE8mcs1Nvq_2rrvkk/edit#heading=h.m8306jv8lurg

Jaeger doesn't support it, so we'll need validation for that

Acceptance Criteria:

• support setting ingress.contextPath on Routes for grafana and prometheus
• validation should catch it if you're trying to set it on Jaeger - it's not supported
• operator unit test