in 46616712, we tried to keep the tmpdir only if the test failed,
and keep up to 1 of them using the recently introduced
option of `tmp_path_retention_count`. but it turns out this option
is not supported by the pytest used by our jenkins nodes, where we
have pytest 6.2.5. this is the one shipped along with fedora 36.
so, in this change, the tempdir is removed if the test completes
without failures. as the tempdir contains huge number of files,
and jenkins is quite slow scanning them. after nuking the tempdir,
jenkins will be much faster when scanning for the artifacts.
Fixes#14690
Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>
Closes#14772
a87b0d68cd