Share dependency queue defaults by namespace

Keep the batch size, fill window, and merge method in each namespace's
shared configuration.  Preserve repository-specific approval and CI rules.

Author: knu

.github/mergify.yml

@@ -1,8 +1,7 @@
+extends: .github
+
 queue_rules:
 - name: dependency-updates
-  batch_size: 1
-  checks_timeout: auto
-  merge_method: merge
   queue_conditions:
   - base = master
   - author ~= ^(dependabot|renovate|lockfile-maintenance)\[bot\]$
@@ -13,7 +12,6 @@ queue_rules:
   merge_conditions: &id001
   - '#approved-reviews-by >= 1'
   - '#changes-requested-reviews-by = 0'
-  batch_max_wait_time: 1 min
 merge_protections:
 - name: approved-dependency-updates
   if:
@@ -28,4 +26,3 @@ merge_protections_settings:
   - -conflict
   - '#approved-reviews-by >= 1'
   - '#changes-requested-reviews-by = 0'
-  reporting_method: check-runs