When `management.metrics.web.server.auto-time-requests` is enabled
(default=true), Spring Boot collects metrics on controller methods even
when they are not annotated with `@Timed`.

When this happens, created metrics are based on the default
`@Timed` configuration and there is no way to customize the
configuration of those auto-timed controller metrics.

This commit adds default configurations to auto-timed requests on both
client and server sides.

See gh-15988