upgrade to use lambda v2 payload format #625

Job	Run time
build (aws-lambda-http)	50s
build (aws-lambda-custom-runtime)	1m 7s
build (aws-lambda-events)	56s
build (bearer-auth)	1m 6s
build (graalvm)	52s
build (hello-world)	49s
build (hexagonal)	54s
build (hotwire)	45s
build (http4k-connect)	1m 6s
build (graphql)	49s
build (json-api)	54s
build (oauth)	1m 3s
build (openapi)	1m 0s
build (quarkus)	1m 5s
build (react-app)	1m 2s
build (typesafe-configuration)	49s
build (web-content)	1m 2s
build (websockets)	1m 4s
	17m 13s

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