gnu: ceph: Update to 13.2.2.

gnu: ceph: Update to 13.2.2.

* gnu/packages/patches/ceph-skip-unittest_blockdev.patch: Adjust for 13.2.2.
* gnu/packages/patches/ceph-rocksdb-compat.patch: Delete file.
* gnu/packages/patches/ceph-detect-rocksdb.patch,
gnu/packages/patches/ceph-volume-respect-PATH.patch: New files.
* gnu/local.mk (dist_patch_DATA): Adjust accordingly.
* gnu/packages/storage.scm (ceph): Update to 13.2.2.
[source]: Don't remove src/dpdk, which has been moved to src/spdk/dpdk and
is purged elsewhere.  Drop bundled rapidjson.  Adjust patch list.
[arguments]: Add "-DWITH_MGR_DASHBOARD_FRONTEND=OFF" and "-DWITH_SPDK=OFF" to
 #:configure-flags.   Drop obsolete "-DWITH_EMBEDDED".  Add workaround for
<https://bugs.gnu.org/30756>.  Remove obsolete test substitution.  Rework
'wrap-python-script' to be less verbose and wrap more scripts.
[native-inputs]: Add GCC-7.
[inputs]: Add OATH-TOOLKIT, RAPIDJSON and PYTHON2-SIX.