feat: emit inferred aws.alb span for ALB-triggered Lambdas #877

Job	Run time
build	1m 10s
system-tests / Get parameters / Get parameters	12s
system-tests / Build end-to-end (function-url)	55s
system-tests / Build end-to-end (apigw-rest)	54s
system-tests / Build end-to-end (alb)	55s
system-tests / Build end-to-end (apigw-http)	54s
system-tests / Build end-to-end (alb-multi)	53s
system-tests / parametric	0s
system-tests / End-to-end #1 / alb 1	2m 48s
system-tests / End-to-end #1 / apigw-rest 1	3m 5s
system-tests / End-to-end #1 / apigw-http 1	3m 11s
system-tests / End-to-end #1 / function-url 1	2m 44s
system-tests / End-to-end #1 / alb-multi 1	3m 17s
	20m 58s

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