Merge pull request #51264 from idryomov/wip-rbd-gtest-skip

test/librbd: use GTEST_SKIP macro to skip tests

Reviewed-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
Reviewed-by: Mykola Golub <mgolub@suse.com>

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

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