smbd: Fix Coverity ID 1648344: print work-dir properly

smbd: Fix Coverity ID 1648344: print work-dir properly

Commit 509081e7e ("smbd: expand logging in contend_dirleases()") added a
log-trace which calls get_current_dir_name() on-the-fly, which caused a
Coverity issue (memory-leak). Replace this call with the proper call to
SMB_VFS_GETWD (+ release memory).

Fixes Coverity issue 1648344

Signed-off-by: Shachar Sharon <ssharon@redhat.com>
Reviewed-by: Anoop C S <anoopcs@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Fri Jun 13 09:55:09 UTC 2025 on atb-devel-224