SpringBoot Auto-configure micrometer DiskSpaceMetrics

AFAICT we don't currently configure DiskSpaceMetrics.

Comment From: izeye

For your information, there was a PR against the micrometer-spring-legacy module that was pending for some reason.

See https://github.com/micrometer-metrics/micrometer/pull/703

/cc @jkschneider

Comment From: snicoll

Closing in favor of PR #26001