Align RavenDB Storage.FreeSpaceAlertThresholdInPercentages with SC storage space settings key

[ramonsmits]

Describe the suggested improvement

Is your improvement related to a problem? Please describe.

The RavenDB log can contain the following warning:

2025-02-15T09:46:45.7770704Z, 94, Operations, StorageSpaceMonitor, Raven.Server.Storage.StorageSpaceMonitor, The following disks are running out of space:
  - 'C:\ (Windows)' has 12.6% of free space which is below the configured threshold (15%). Total free space: 32.242 GBytes

Its freespace check is similar to ServiceControl its check.

This is configurable via Storage.FreeSpaceAlertThresholdInPercentages and its default value is 15.

Describe the suggested solution

Configure the Storage.FreeSpaceAlertThresholdInPercentages database setting with the same value as ServiceControl.

Additional Context

No response