Align config filename with production and update npm loading task name

core.lister_base: Align config filename with production (see https://forge.softwareheritage.org/source/puppet-swh-site/browse/production/data/defaults.yaml$2054-2103)

npm.lister: Update loading task name Related swh-scheduler#1508 (closed)

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Migrated from D1401 (view on Phabricator)

swh/lister/core/lister_base.py

@@ -234,7 +234,7 @@ class SWHListerBase(abc.ABC, config.SWHConfig):
 
     @property
     def CONFIG_BASE_FILENAME(self):  # noqa: N802
-        return 'lister-%s' % self.LISTER_NAME
+        return 'lister_%s' % self.LISTER_NAME
 
     @property
     def ADDITIONAL_CONFIG(self):  # noqa: N802