Change certificate key size to 4096 bits (#984) #1826

Job	Run time
Check whether integration tests should run based on the changed files	5s
Check whether UI tests should run based on the changed files	9s
Check whether unit test & lint should run based on the changed files	9s
Check whether to run verify-commit-pins	5s
Check whether to wait for image build	8s
Dispatch verify-commit-pins	0s
Dispatch unit test / Run unit tests with experimental build tag	3m 34s
Dispatch unit test / Lint	5m 36s
Dispatch unit test / Run unit tests	4m 16s
Wait for image build	9m 30s
Dispatch UI tests	0s
Dispatch integration tests / Istio upgrade integration test	4m 26s
Dispatch integration tests / Istio integration test	19m 13s
Dispatch integration tests / Kubernetes version compatibility test	20m 33s
Dispatch integration tests / Istio integration test evaluation	3m 46s
	1h 11m 30s

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