mergify: rebase PRs for the VM autobump (#8470)

Author: v1v

.mergify.yml

@@ -39,6 +39,15 @@ pull_request_rules:
     actions:
       queue:
         name: default
+  - name: rebase pull requests for the VM autobump
+    conditions:
+      - author=github-actions[bot]
+      - files~=^.buildkite/(pipeline.yml|bk.integration.pipeline.yml|.buildkite/bk.integration-fips.pipeline.yml)$
+      - head~=^updatecli_.*
+      - "#check-failure>0"
+      - schedule=Tue-Fri 04:00-06:00[Europe/Paris]
+    actions:
+      rebase:
   - name: self-assign PRs
     conditions:
       - -merged