Port osbuild/images v0.33.0 with dot-notation to composer

Update the osbuild/images to the version which introduces "dot notation"
for distro release versions.

 - Replace all uses of distroregistry by distrofactory.
 - Delete local version of reporegistry and use the one from the
   osbuild/images.
 - Weldr: unify `createWeldrAPI()` and `createWeldrAPI2()` into a single
   `createTestWeldrAPI()` function`.
 - store/fixture: rework fixtures to allow overriding the host distro
   name and host architecture name. A cleanup function to restore the
   host distro and arch names is always part of the fixture struct.
 - Delete `distro_mock` package, since it is no longer used.
 - Bump the required version of osbuild to 98, because the OSCAP
   customization is using the 'compress_results' stage option, which is
   not available in older versions of osbuild.

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

vendor/github.com/osbuild/images/pkg/manifest/vmdk.go

@@ -25,14 +25,13 @@ func (p *VMDK) SetFilename(filename string) {
 // raw image. imgOstreePipeline is the pipeline producing the raw ostree image.
 // Either imgPipeline or imgOStreePipeline are required, but not both at the same time.
 // Filename is the name of the produced image.
-func NewVMDK(buildPipeline *Build, imgPipeline FilePipeline) *VMDK {
+func NewVMDK(buildPipeline Build, imgPipeline FilePipeline) *VMDK {
 	p := &VMDK{
-		Base:        NewBase(imgPipeline.Manifest(), "vmdk", buildPipeline),
+		Base:        NewBase("vmdk", buildPipeline),
 		imgPipeline: imgPipeline,
 		filename:    "image.vmdk",
 	}
 	buildPipeline.addDependent(p)
-	imgPipeline.Manifest().addPipeline(p)
 	return p
 }