rebase: bump github.com/ceph/go-ceph

Bumps [github.com/ceph/go-ceph](https://github.com/ceph/go-ceph) from 0.29.1-0.20240925141413-065319c78733 to 0.30.0.
- [Release notes](https://github.com/ceph/go-ceph/releases)
- [Changelog](https://github.com/ceph/go-ceph/blob/master/docs/release-process.md)
- [Commits](https://github.com/ceph/go-ceph/commits/v0.30.0)

---
updated-dependencies:
- dependency-name: github.com/ceph/go-ceph
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/ceph/go-ceph/rbd/group_snap.go

@@ -91,11 +91,25 @@ const (
 	GroupSnapStateComplete = GroupSnapState(C.RBD_GROUP_SNAP_STATE_COMPLETE)
 )
 
-// GroupSnapInfo values are returned by GroupSnapList, representing the
-// snapshots that are part of an rbd group.
+// GroupSnap contains the information of a single snapshot that is part of a
+// group snapshot.
+type GroupSnap struct {
+	Name   string
+	PoolID uint64
+	SnapID uint64
+}
+
+// GroupSnapInfo values are returned by GroupSnapList and GroupSnapGetInfo,
+// representing the group snapshots that are created of an rbd group.
+// SnapName, ID and Snapshots are only set by the GroupSnapGetInfo function.
 type GroupSnapInfo struct {
 	Name  string
 	State GroupSnapState
+
+	SnapName string
+	ID       string
+
+	Snapshots []GroupSnap
 }
 
 // GroupSnapList returns a slice of snapshots in a group.
@@ -190,7 +204,7 @@ func GroupSnapRollbackWithProgress(
 	cb GroupSnapRollbackCallback, data interface{}) error {
 	// the provided callback must be a real function
 	if cb == nil {
-		return rbdError(C.EINVAL)
+		return getError(C.EINVAL)
 	}
 
 	cGroupName := C.CString(group)