ci(mergify): upgrade configuration to current format

.mergify.yml

@@ -1,3 +1,26 @@
+queue_rules:
+  - name: duplicated default from Re-queue any PR with a 'requeue' label
+    queue_conditions:
+      - label=requeue
+    merge_conditions: []
+    merge_method: fast-forward
+    update_method: rebase
+    autosquash: true
+    merge_bot_account: &name_merge_bot rbusarow-bot
+    update_bot_account: &name_merge_bot rbusarow-bot
+  - name: default
+    merge_conditions:
+      - and: &label_automerge
+          - label=automerge
+      - and: &base_main
+          - base=main
+      - and: &not_label_dnm
+          - label!=do-not-merge
+    merge_method: fast-forward
+    update_method: rebase
+    autosquash: true
+    merge_bot_account: *name_merge_bot
+    update_bot_account: *name_merge_bot
 shared:
   author-bot: &author_bot
     - or:
@@ -6,42 +29,25 @@ shared:
         - author=renovate[bot]
   author-rbusarow: &author_rbusarow
     - author=RBusarow
-  base-main: &base_main
-    - base=main
+  base-main: *base_main
   label-approved: &label_approved
     - label=approved
-  label-automerge: &label_automerge
-    - label=automerge
-  label-dnm: &label_dnm
+  label-automerge: *label_automerge
+  label-dnm:
     - label=do-not-merge
-  not-label-dnm: &not_label_dnm
-    - label!=do-not-merge
+  not-label-dnm: *not_label_dnm
   label-rebase: &label_rebase
     - label=rebase
   name-approved: &name_approved approved
   name-automerge: &name_automerge automerge
   name-rb-org-bot: &name_rb_org_bot rb-org-bot[bot]
-  name-merge-bot: &name_merge_bot rbusarow-bot
+  name-merge-bot: *name_merge_bot
   name-rebase: &name_rebase rebase
   success-ci: &success_ci
     - check-success=all-checks
 
-pull_request_rules:
-  - name: Queue PRs for rebase-merge when CI passes and approved
-    # GitHub branch protection rules are also applied automatically
-    conditions:
-      - and: *label_automerge
-      - and: *base_main
-      - and: *not_label_dnm
-    actions:
-      queue:
-        # maybe change to 'rebase' if this causes problems
-        merge_method: fast-forward
-        update_method: rebase # this is also the default when 'merge_method' is 'fast-forward'
-        autosquash: true
-        merge_bot_account: *name_merge_bot
-        update_bot_account: *name_merge_bot
 
+pull_request_rules:
   - name: Remove automerge label once merged
     conditions:
       - merged
@@ -96,12 +102,10 @@ pull_request_rules:
     conditions:
       - label=requeue
     actions:
-      queue:
-        # maybe change to 'rebase' if this causes problems
-        merge_method: fast-forward
-        update_method: rebase # this is also the default when 'merge_method' is 'fast-forward'
-        autosquash: true
-        merge_bot_account: *name_merge_bot
       label:
         remove:
           - requeue
+  - name: refactored queue action rule
+    conditions: []
+    actions:
+      queue: