Feat(SREP-202): add service log for ROSA HCP force upgrades

[typeid]

Based on https://github.com/openshift/ops-sop/pull/3731, this adds a new SL that we send after scheduling an end of support y-stream upgrade.

[openshift-ci]

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[geowa4]

I feel like we should be more forward with how this benefits the customer receiving this notification. I'm thinking something like this. What do you think?

To ensure your cluster remains secure and has all critical updates, Red Hat automatically upgraded your cluster running the end-of-life version ${VERSION} to the next supported OpenShift minor version. Your attention may be required if this impacts cluster components or workloads. See this documentation for more information: https://docs.redhat.com/en/documentation/red_hat_openshift_service_on_aws/4/html/introduction_to_rosa/policies-and-service-definition#rosa-minor-versions_rosa-hcp-life-cycle.

[openshift-ci]

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