chore(main): release service 0.4.28 #6653

Job	Run time
go (examples)	1m 26s
go (sdk)	2m 22s
go (service)	3m 26s
integration tests	5m 49s
go (lib/ocrypto)	1m 13s
go (lib/fixtures)	1m 25s
go (lib/flattening)	1m 11s
Protocol Buffer Lint and Gencode Up-to-date check	15s
image build	1m 36s
otdfctl e2e tests	5m 2s
license check	54s
platform-xtest / cross-client-test	9m 44s
ci	1s
	34m 24s

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