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/internal/cutil/ptrguard.go

@@ -60,10 +60,10 @@ func (v *PtrGuard) Release() {
 // The uintptrPtr() helper function below assumes that uintptr has the same size
 // as a pointer, although in theory it could be larger.  Therefore we use this
 // constant expression to assert size equality as a safeguard at compile time.
-// How it works: the difference of both sizes is converted into an 8 bit value
-// and left-bit-shifted by 8.  This always creates an overflow error at compile
-// time, if the difference of the sizes is not 0.
-const _ = uint8(unsafe.Sizeof(uintptr(0))-PtrSize) << 8 // size assert
+// How it works: if sizes are different, either the inner or outer expression is
+// negative, which always fails with "constant ... overflows uintptr", because
+// unsafe.Sizeof() is a uintptr typed constant.
+const _ = -(unsafe.Sizeof(uintptr(0)) - PtrSize) // size assert
 func uintptrPtr(p *CPtr) *uintptr {
 	return (*uintptr)(unsafe.Pointer(p))
 }

vendor/github.com/ceph/go-ceph/internal/cutil/sync_buffer.go

@@ -1,3 +1,4 @@
+//go:build ptrguard
 // +build ptrguard
 
 package cutil

vendor/github.com/ceph/go-ceph/internal/cutil/sync_buffer_memcpy.go

@@ -1,3 +1,4 @@
+//go:build !ptrguard
 // +build !ptrguard
 
 package cutil