Pick last expires and types from the history (#4811)

The history is ordered from first introduction of the metric to the
latest change.
So the last element is the _current_ valid value for expires (and types).

For example this can be seen for `top_sites.contile_reporting_url` in
Firefox Android which initially was set to expire in v112, but has been
change to never expire later. The current database still lists 112 for
it though.

Co-authored-by: Leli <33942105+lelilia@users.noreply.github.com>

sql/moz-fx-data-shared-prod/telemetry_dev_cycle_external/glean_metrics_stats_v1/query.py

@@ -61,13 +61,13 @@ def download_glean_metrics(url, threshold):
             for name, metric in metrics.items():
                 first_seen = metric["history"][0]["dates"]["first"][:10]
                 last_seen = metric["history"][-1]["dates"]["last"][:10]
-                expires = metric["history"][0]["expires"]
+                expires = metric["history"][-1]["expires"]
                 in_source = metric["in-source"]
                 glean_metrics.append(
                     {
                         "glean_app": glean_app,
                         "metric": name,
-                        "type": metric["history"][0]["type"],
+                        "type": metric["history"][-1]["type"],
                         "first_seen_date": first_seen,
                         "last_seen_date": last_seen,
                         "expires": expires,