Migrate non endpoints specific properties to `management.*`

[snicoll]

In 2.x, endpoints.* is a namespace restricted to the endpoint configuration (not its implementation). We have so far a mix and match that we should fix. For instance, the health "feature" has configuration in endpoints.health and management.health. We should revisit them all and move properties accordingly.

The content of HealthMvcEndpointProperties should probably go to management.health.web.status-mapping or something like that.

[snicoll]

EndpointCorsPropertiesis another one

[snicoll]

Here is a full list with a replacement proposal:

• endpoints.cors.* to management.endpoints.cors.* (Move endpoints.cors to management.endpoints.cors #10053)
• endpoints.configprops.keys-to-sanitize to management.sanitizer.keys ?
• endpoints.env.keys-to-sanitize idem (that's a case by itself that thing needs to be customized in two different places or do we want to keep different settings for this?)
• endpoints.health.mapping to management.health.status.http-mapping (Move endpoints.health.mapping to management.health.status.http-mapping #10052)
• endpoints.logfile.external-file can probably stay there
• endpoints.metrics.filter.* to management.metrics.filter.* (for some reason, existing keys are in spring.metrics.*)
• endpoints.trace.filter.enabled to management.trace.filter.enabled

The other problem now is that management.* is a bit like server and spring combined: at the root we have a bunch of properties for the management "server" but sub-groups define things related to the actuator. I am not sure moving management.port to management.server.port is going to make our users happy so maybe we should consider alternatives to clean this up.

[snicoll]

Let's go with the last two and keep the other ones for now. We can reconsider later if necessary.