ci(workflow): auto-rebase stacked PRs on merge #411

Job	Run time
Orchestrator Integration Test	2m 23s
Build and Unit Test	1m 42s
E2E Integration Test	2m 32s
Tidy	1m 19s
Counter Extension Test	1m 15s
Gateway Integration Test	2m 3s
Consumer Integration Test	1m 52s
Queue Extension Test	3m 33s
Storage Extension Test	1m 12s
Lint	1m 2s
Required Checks	3s
	18m 56s

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