blueprint: move tar towards lorax parity

The main difference (according to `rpm -qa`) is an additional package
containing a gpg key which was used to verify packages. The one
generated by lorax-composer doesn't have this, because it doesn't verify
signatures.

internal/blueprint/blueprint_test.go

@@ -154,7 +154,7 @@ func TestFilenameFromType(t *testing.T) {
 		{
 			name:  "tar",
 			args:  args{"tar"},
-			want:  "image.tar",
+			want:  "root.tar.xz",
 			want1: "application/x-tar",
 		},
 		{

internal/blueprint/f30_helpers.go

@@ -170,7 +170,7 @@ func addF30QemuAssembler(p *pipeline.Pipeline, format string, filename string) {
 		})
 }
 
-func addF30TarAssembler(p *pipeline.Pipeline, filename string) {
+func addF30TarAssembler(p *pipeline.Pipeline, filename, compression string) {
 	p.Assembler = pipeline.NewTarAssembler(
 		&pipeline.TarAssemblerOptions{
 			Filename: filename,

internal/blueprint/tar_output.go

@@ -5,14 +5,28 @@ import "github.com/osbuild/osbuild-composer/internal/pipeline"
 type tarOutput struct{}
 
 func (t *tarOutput) translate(b *Blueprint) *pipeline.Pipeline {
-	p := getF30Pipeline()
+	packages := [...]string{
+		"policycoreutils",
+		"selinux-policy-targeted",
+		"kernel",
+		"firewalld",
+		"chrony",
+		"langpacks-en",
+	}
+	excludedPackages := [...]string{
+		"dracut-config-rescue",
+	}
+	p := getCustomF30PackageSet(packages[:], excludedPackages[:])
+	addF30LocaleStage(p)
+	addF30GRUB2Stage(p, b.getKernelCustomization())
+	addF30FixBlsStage(p)
 	addF30SELinuxStage(p)
-	addF30TarAssembler(p, t.getName())
+	addF30TarAssembler(p, t.getName(), "xz")
 	return p
 }
 
 func (t *tarOutput) getName() string {
-	return "image.tar"
+	return "root.tar.xz"
 }
 
 func (t *tarOutput) getMime() string {