ci(mergify): upgrade configuration to current format

Author: mergify[bot]

.mergify.yml

@@ -2,37 +2,54 @@ merge_queue:
   max_parallel_checks: 3
 
 queue_rules:
+  - name: duplicated main-queue from automatic merge to main or backport branch
+    batch_size: 3
+    queue_conditions:
+      - "#approved-reviews-by >= 1"
+      - base = main
+      - label = "merge"
+      - label != "do-not-merge"
+      - "#approved-reviews-by >= 1"
+      - &id001
+        or:
+          - base = main
+          - base = maint-0.45
+    merge_conditions: []
+    merge_method: merge
+    autosquash: true
   - name: main-queue
     batch_size: 3
     queue_conditions:
       - "#approved-reviews-by >= 1"
       - base = main
     merge_method: merge
 
+  - name: duplicated backport-0.45-queue from automatic merge to main or backport
+      branch
+    batch_size: 3
+    queue_conditions:
+      - "#approved-reviews-by >= 1"
+      - base = maint-0.45
+      - label = "merge"
+      - label != "do-not-merge"
+      - "#approved-reviews-by >= 1"
+      - *id001
+    merge_conditions: []
+    merge_method: merge
+    autosquash: true
   - name: backport-0.45-queue
     batch_size: 3
     queue_conditions:
       - "#approved-reviews-by >= 1"
       - base = maint-0.45
     merge_method: merge
 
-pull_request_rules:
-  - name: automatic merge to main or backport branch
-    conditions:
-        - label = "merge"
-        - label != "do-not-merge"
-        - "#approved-reviews-by >= 1"
-        - or:
-          - base = main
-          - base = maint-0.45
-    actions:
-      queue:
-        autosquash: true   
 
+pull_request_rules:
   - name: notify when a PR is removed from the queue
     conditions:
-    - queue-dequeue-reason != none
-    - queue-dequeue-reason != pr-merged
+      - queue-dequeue-reason != none
+      - queue-dequeue-reason != pr-merged
     actions:
       comment:
         message: >
@@ -49,3 +66,7 @@ pull_request_rules:
       backport:
         branches:
           - "maint-0.45"
+  - name: refactored queue action rule
+    conditions: []
+    actions:
+      queue: