wt-status: use hash_algo from local repository instead of global the_hash_algo

wt-status: use hash_algo from local repository instead of global the_hash_algo

wt-status.c still uses the global the_hash_algo even though a repository
instance is already available via struct wt_status.

Replace uses of the_hash_algo with the hash algorithm stored in the
associated repository (s->repo->hash_algo or r->hash_algo).

This removes another dependency on global state and keeps wt-status
consistent with local repository usage.

Signed-off-by: Shreyansh Paliwal <shreyanshpaliwalcmsmn@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>