fix: set route host properly when clusterRouterBase is set

[Zaperex]

Description of the change

Set route host to the auto-generated value when clusterRouterBase is set.
The desired manifest for helm should now match the expected host

Additional Information

Now it doesn't actually get Openshift to auto-generate it. It instead utilizes the janus-idp.hostname value which matches the auto-generated value.

This will now require the clusterRouterBase to be properly configured or else the route host will be invalid and users will not be able to access the application via the Route.

Before this change, the route will still be valid if clusterRouterBase is misconfigured and users will still be able to the application, but the backstage config will be incorrect.

Existing or Associated Issue(s)

Fixes #136

Checklist

• Chart version bumped in Chart.yaml according to semver.
• Variables are documented in the values.yaml and added to the README.md. The pre-commit utility can be used to generate the necessary content. Use pre-commit run -a to apply changes.
• JSON Schema template updated and re-generated the raw schema via pre-commit hook.
• List tests pass for Chart using the Chart Testing tool and the ct lint command.

[openshift-ci]

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This pull-request has been approved by: rm3l

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