Update osbuild/images to v0.40.0

In addition, simplify the SPEC file to not have to update the minimum
required osbuild version gazillion times, but just once.

Update the minimum required osbuild version to v109, due to changes in
grub2 stages required by the new osbuild/images version.

Update osbild SHA in Schutzfile to v109.

Signed-off-by: Tomáš Hozza <thozza@redhat.com>

vendor/github.com/osbuild/images/pkg/disk/partition_table.go

@@ -750,3 +750,20 @@ func (pt *PartitionTable) GetBuildPackages() []string {
 
 	return packages
 }
+
+// GetMountpointSize takes a mountpoint and returns the size of the entity this
+// mountpoint belongs to.
+func (pt *PartitionTable) GetMountpointSize(mountpoint string) (uint64, error) {
+	path := entityPath(pt, mountpoint)
+	if path == nil {
+		return 0, fmt.Errorf("cannot find mountpoint %s", mountpoint)
+	}
+
+	for _, ent := range path {
+		if sizeable, ok := ent.(Sizeable); ok {
+			return sizeable.GetSize(), nil
+		}
+	}
+
+	panic(fmt.Sprintf("no sizeable of the entity path for mountpoint %s, this is a programming error", mountpoint))
+}