leak tests: mark a read-tree test as passing SANITIZE=leak
The "t1002-read-tree-m-u-2way.sh" test has passed under SANITIZE=leak
since
04988c8d182 (unpack-trees: introduce preserve_ignored to
unpack_trees_options, 2021-09-27) was combined with
e5a917fcf42 (unpack-trees: don't leak memory in
verify_clean_subdirectory(), 2021-10-07), but as both were in-flight
at the time neither could mark it as passing.
It will now be listed as running under the
"GIT_TEST_PASSING_SANITIZE_LEAK=true" test mode (the "linux-leaks" CI
target).
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>