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/container/resolver.go

@@ -31,8 +31,8 @@ type SourceSpec struct {
 	StoragePath         *string
 }
 
-func NewResolver(arch string) Resolver {
-	return Resolver{
+func NewResolver(arch string) *Resolver {
+	return &Resolver{
 		ctx:   context.Background(),
 		queue: make(chan resolveResult, 2),
 		Arch:  arch,