ci: migrate CI secrets from AWS SSM to Vault KV #523

Job	Run time
build	1m 4s
system-tests / Get parameters / Get parameters	12s
system-tests / Build end-to-end (alb-multi)	1m 14s
system-tests / Build end-to-end (alb)	1m 17s
system-tests / Build end-to-end (apigw-rest)	1m 15s
system-tests / Build end-to-end (apigw-http)	1m 14s
system-tests / Build end-to-end (function-url)	1m 12s
system-tests / parametric	0s
system-tests / End-to-end #1 / alb 1	3m 14s
system-tests / End-to-end #1 / function-url 1	3m 22s
system-tests / End-to-end #1 / alb-multi 1	3m 45s
system-tests / End-to-end #1 / apigw-rest 1	4m 2s
system-tests / End-to-end #1 / apigw-http 1	3m 21s
system-tests / Report failures	0s
	25m 12s

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