HDDS-12565. VolumeUsage#hasVolumeEnoughSpace should treat volumeFreeSpaceToSpare as reserved space

[peterxcli]

What changes were proposed in this pull request?

VolumeUsage#hasVolumeEnoughSpace should treat volumeFreeSpaceToSpare as reserved space.
Currently it's allowed to allocate space from volumeFreeSpaceToSpare.

public static boolean hasVolumeEnoughSpace(long volumeAvailableSpace,
                                           long volumeCommittedBytesCount,
                                           long requiredSpace,
                                           long volumeFreeSpaceToSpare) {
  return (volumeAvailableSpace - volumeCommittedBytesCount) >
      Math.max(requiredSpace, volumeFreeSpaceToSpare);
}

What is the link to the Apache JIRA

https://issues.apache.org/jira/browse/HDDS-12565

How was this patch tested?

CI:
https://github.com/peterxcli/ozone/actions/runs/13868674388
https://github.com/peterxcli/ozone/actions/runs/13869299568