Merge pull request #31280 from zy751713126/snap_get_name_and_id

librbd: add snap_get_name and snap_get_id method API

diff --cc src/include/rbd/librbd.h
Simple merge

diff --cc src/include/rbd/librbd.hpp
Simple merge

diff --cc src/librbd/librbd.cc
Simple merge

diff --cc src/pybind/rbd/rbd.pyx
Simple merge

diff --cc src/test/librbd/test_librbd.cc
Simple merge

diff --cc src/test/pybind/test_rbd.py
Simple merge