rebase: bump github.com/ceph/go-ceph from 0.11.0 to 0.12.0

Bumps [github.com/ceph/go-ceph](https://github.com/ceph/go-ceph) from 0.11.0 to 0.12.0.
- [Release notes](https://github.com/ceph/go-ceph/releases)
- [Changelog](https://github.com/ceph/go-ceph/blob/master/docs/release-process.md)
- [Commits](https://github.com/ceph/go-ceph/compare/v0.11.0...v0.12.0)

---
updated-dependencies:
- dependency-name: github.com/ceph/go-ceph
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/ceph/go-ceph/rbd/admin/imagespec.go

@@ -0,0 +1,46 @@
+//go:build !nautilus && ceph_preview
+// +build !nautilus,ceph_preview
+
+package admin
+
+import (
+	"fmt"
+)
+
+// ImageSpec values are used to identify an RBD image wherever Ceph APIs
+// require an image_spec/image_id_spec using image name/id and optional
+// pool and namespace.
+//  PREVIEW
+type ImageSpec struct {
+	spec string
+}
+
+// NewImageSpec is used to construct an ImageSpec given an image name/id
+// and optional namespace and pool names.
+//  PREVIEW
+//
+// NewImageSpec constructs an ImageSpec to identify an RBD image and thus
+// requires image name/id, whereas NewLevelSpec constructs LevelSpec to
+// identify entire pool, pool namespace or single RBD image, all of which
+// requires pool name.
+func NewImageSpec(pool, namespace, image string) ImageSpec {
+	var s string
+	if pool != "" && namespace != "" {
+		s = fmt.Sprintf("%s/%s/%s", pool, namespace, image)
+	} else if pool != "" {
+		s = fmt.Sprintf("%s/%s", pool, image)
+	} else {
+		s = image
+	}
+	return ImageSpec{s}
+}
+
+// NewRawImageSpec returns a ImageSpec directly based on the spec string
+// argument without constructing it from component values.
+//  PREVIEW
+//
+// This should only be used if NewImageSpec can not create the imagespec value
+// you want to pass to ceph.
+func NewRawImageSpec(spec string) ImageSpec {
+	return ImageSpec{spec}
+}