refactor(cc-tile-metrics)!: rework properties to avoid impossible states

[florian-sanders-cc]

What does this PR do?

• Refactors the cc-tile-metrics component to implement our new state structure,
• Implements TypeChecking within the cc-tile-metrics component and its stories.

How to review?

• Check the commit (the diff may not be easy to read so you can review the final result locally if you prefer),
• If you check it locally, you should not get any Typescript error within the component file or the story file,
• Compare the prod stories to the preview stories,
• Don't forget to check the smart using the demo-smart page.

Note: There are a few changes that you should review / pay more attention to. The grafana link now has a state of its own because its data comes from a separate source. It cannot be set to error because there is a fallback link within the smart. This may not be the best idea, I'm not really sure so don't hesitate to weigh in with other ideas / suggestions. On the contrary, the metricsLink is a simple property since it is not set by the smart and it does not depend on any API. This means that the metricsLink cannot be loading / in skeleton mode contrary to what we currently have in prod :thinking:.

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