ci: revamp workflows #36

Job	Run time
Run tests / Validate SAM templates	27s
Run tests / Run Go tests	48s
Run tests / Lint Go	53s
Upload SAM assets / Check permissions	4s
Upload SAM assets / Package and upload SAM apps	1m 9s
Run integration tests / discover	4s
Run integration tests / provision	11s
Run integration tests / tests (config)	2m 40s
Run integration tests / tests (configsubscription)	2m 57s
Run integration tests / tests (firehose)	4m 22s
Run integration tests / tests (forwarder)	4m 20s
Run integration tests / tests (forwarder_s3)	4m 19s
Run integration tests / tests (logwriter)	4m 23s
Run integration tests / tests (metricstream)	3m 43s
Run integration tests / tests (simple)	41s
Run integration tests / tests (stack)	4m 21s
Run integration tests / cleanup	2s
	35m 24s

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