rebase: bump github.com/ceph/go-ceph from 0.20.0 to 0.21.0

Bumps [github.com/ceph/go-ceph](https://github.com/ceph/go-ceph) from 0.20.0 to 0.21.0.
- [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/v0.20.0...v0.21.0)

---
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/cephfs/admin/mgrmodule.go

@@ -9,7 +9,8 @@ const mirroring = "mirroring"
 // EnableMirroringModule will enable the mirroring module for cephfs.
 //
 // Similar To:
-//  ceph mgr module enable mirroring [--force]
+//
+//	ceph mgr module enable mirroring [--force]
 func (fsa *FSAdmin) EnableMirroringModule(force bool) error {
 	mgradmin := manager.NewFromConn(fsa.conn)
 	return mgradmin.EnableModule(mirroring, force)
@@ -18,7 +19,8 @@ func (fsa *FSAdmin) EnableMirroringModule(force bool) error {
 // DisableMirroringModule will disable the mirroring module for cephfs.
 //
 // Similar To:
-//  ceph mgr module disable mirroring
+//
+//	ceph mgr module disable mirroring
 func (fsa *FSAdmin) DisableMirroringModule() error {
 	mgradmin := manager.NewFromConn(fsa.conn)
 	return mgradmin.DisableModule(mirroring)