misc/coverage: Display counters for bzr/cvs visit types conditionally

When loading task types are available for these visit types in the swh deployment environment (currently staging and docker), display the associated counters in the coverage widget.

Related to swh-loader-bzr#3945 (closed)

Related to swh-loader-cvs#3835 (closed)

---

Migrated from D7221 (view on Phabricator)

swh/web/misc/coverage.py

-# Copyright (C) 2018-2021  The Software Heritage developers
+# Copyright (C) 2018-2022  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU Affero General Public License version 3, or any later version
 # See top-level LICENSE file for more information
@@ -17,6 +17,7 @@ from django.views.decorators.clickjacking import xframe_options_exempt
 
 from swh.scheduler.model import SchedulerMetrics
 from swh.web.common import archive
+from swh.web.common.origin_save import get_savable_visit_types
 from swh.web.common.utils import get_deposits_list, reverse
 from swh.web.config import scheduler
 
@@ -330,8 +331,11 @@ def _swh_coverage(request):
         origins["count"] = f"{count:,}"
         origins["instances"] = defaultdict(dict)
         for instance, metrics in listers_metrics[origins_type]:
-            # not yet in production
-            if metrics.visit_type in ("bzr", "cvs"):
+            # these types are available in staging/docker but not yet in production
+            if (
+                metrics.visit_type in ("bzr", "cvs")
+                and metrics.visit_type not in get_savable_visit_types()
+            ):
                 continue
             instance_count = metrics.origins_known - metrics.origins_never_visited
             origins["instances"][instance].update(