distro/rhel8: update edge raw image to new definitions

Using the same pipeline code as RHEL 9 and Fedora introduces the
following changes to the image:
- ostree.config: moved and uses the stage mount instead of the old
  stage-specific options.
- lock root password like we do in Fedora and RHEL 9.
- set keymap to us and locale to C.UTF-8 like in Fedora and RHEL 9.
- grub2 contains kernel options and unified set to true.  This stage
  also now uses the ostree mount options to set up the deployment when
  running.

internal/distro/rhel8/edge.go

@@ -65,21 +65,19 @@ func edgeOCIImgType(rd distribution) imageType {
 }
 func edgeRawImgType() imageType {
 	it := imageType{
-		name:        "edge-raw-image",
-		nameAliases: []string{"rhel-edge-raw-image"},
-		filename:    "image.raw.xz",
-		mimeType:    "application/xz",
-		packageSets: map[string]packageSetFunc{
-			buildPkgsKey: edgeRawImageBuildPackageSet,
-		},
+		name:                "edge-raw-image",
+		nameAliases:         []string{"rhel-edge-raw-image"},
+		filename:            "image.raw.xz",
+		mimeType:            "application/xz",
+		packageSets:         nil,
 		defaultSize:         10 * common.GibiByte,
 		rpmOstree:           true,
 		bootable:            true,
 		bootISO:             false,
-		pipelines:           edgeRawImagePipelines,
+		image:               edgeRawImage,
 		buildPipelines:      []string{"build"},
-		payloadPipelines:    []string{"image-tree", "image", "archive"},
-		exports:             []string{"archive"},
+		payloadPipelines:    []string{"image-tree", "image", "xz"},
+		exports:             []string{"xz"},
 		basePartitionTables: edgeBasePartitionTables,
 	}
 	return it
@@ -163,12 +161,6 @@ func edgeBuildPackageSet(t *imageType) rpmmd.PackageSet {
 		})
 }
 
-func edgeRawImageBuildPackageSet(t *imageType) rpmmd.PackageSet {
-	return edgeBuildPackageSet(t).Append(edgeEncryptionBuildPackageSet(t)).Append(
-		bootPackageSet(t),
-	)
-}
-
 // edge commit OS package set
 func edgeCommitPackageSet(t *imageType) rpmmd.PackageSet {
 	ps := rpmmd.PackageSet{

internal/distro/rhel8/images.go

@@ -9,6 +9,7 @@ import (
 	"github.com/osbuild/osbuild-composer/internal/image"
 	"github.com/osbuild/osbuild-composer/internal/manifest"
 	"github.com/osbuild/osbuild-composer/internal/osbuild"
+	"github.com/osbuild/osbuild-composer/internal/ostree"
 	"github.com/osbuild/osbuild-composer/internal/platform"
 	"github.com/osbuild/osbuild-composer/internal/rpmmd"
 	"github.com/osbuild/osbuild-composer/internal/users"
@@ -217,3 +218,51 @@ func tarImage(workload workload.Workload,
 	return img, nil
 
 }
+
+func edgeRawImage(workload workload.Workload,
+	t *imageType,
+	customizations *blueprint.Customizations,
+	options distro.ImageOptions,
+	packageSets map[string]rpmmd.PackageSet,
+	containers []container.Spec,
+	rng *rand.Rand) (image.ImageKind, error) {
+
+	commit := ostree.CommitSpec{
+		Ref:        options.OSTree.ImageRef,
+		URL:        options.OSTree.URL,
+		ContentURL: options.OSTree.ContentURL,
+		Checksum:   options.OSTree.FetchChecksum,
+	}
+	img := image.NewOSTreeRawImage(commit)
+
+	img.Users = users.UsersFromBP(customizations.GetUsers())
+	img.Groups = users.GroupsFromBP(customizations.GetGroups())
+
+	// "rw" kernel option is required when /sysroot is mounted read-only to
+	// keep stateful parts of the filesystem writeable (/var/ and /etc)
+	img.KernelOptionsAppend = []string{"modprobe.blacklist=vc4", "rw"}
+	// TODO: move to image config
+	img.Keyboard = "us"
+	img.Locale = "C.UTF-8"
+	img.SysrootReadOnly = true
+
+	img.Platform = t.platform
+	img.Workload = workload
+	img.Remote = ostree.Remote{
+		Name:       "rhel-edge",
+		URL:        options.OSTree.URL,
+		ContentURL: options.OSTree.ContentURL,
+	}
+	img.OSName = "redhat"
+
+	// TODO: move generation into LiveImage
+	pt, err := t.getPartitionTable(customizations.GetFilesystems(), options, rng)
+	if err != nil {
+		return nil, err
+	}
+	img.PartitionTable = pt
+
+	img.Filename = t.Filename()
+
+	return img, nil
+}

internal/distro/rhel8/pipelines.go

@@ -159,23 +159,6 @@ func edgeImagePipelines(t *imageType, customizations *blueprint.Customizations,
 	return pipelines, xzPipeline.Name, nil
 }
 
-func edgeRawImagePipelines(t *imageType, customizations *blueprint.Customizations, options distro.ImageOptions, repos []rpmmd.RepoConfig, packageSetSpecs map[string][]rpmmd.PackageSpec, containers []container.Spec, rng *rand.Rand) ([]osbuild.Pipeline, error) {
-	pipelines := make([]osbuild.Pipeline, 0)
-	pipelines = append(pipelines, *buildPipeline(repos, packageSetSpecs[buildPkgsKey], t.arch.distro.runner.String()))
-
-	imgName := t.filename
-
-	// create the raw image
-	imagePipelines, _, err := edgeImagePipelines(t, customizations, imgName, options, rng)
-	if err != nil {
-		return nil, err
-	}
-
-	pipelines = append(pipelines, imagePipelines...)
-
-	return pipelines, nil
-}
-
 func buildPipeline(repos []rpmmd.RepoConfig, buildPackageSpecs []rpmmd.PackageSpec, runner string) *osbuild.Pipeline {
 	p := new(osbuild.Pipeline)
 	p.Name = "build"