[core] Implement Lambda streaming with custom HTTP headers #678

Job	Run time
Unit tests / Construct unit test matrix	3s
Semantic Version label check	7s
musl	1m 37s
Swift 6 Language Mode / Swift 6 language mode	1m 17s
Soundness / License headers check	5s
Soundness / Broken symlinks check	4s
Soundness / API breakage check	2m 30s
Soundness / Documentation check	1m 38s
Soundness / Shell check	32s
Soundness / Format check	36s
Soundness / Unacceptable language check	4s
Soundness / Python lint check	7s
Integration Tests / Test Examples/APIGateway on	1m 56s
Soundness / YAML lint check	4s
Integration Tests / Test Examples/S3_AWSSDK on	6m 36s
Integration Tests / Test Examples/ResourcesPackaging on	1m 57s
Integration Tests / Test Examples/S3EventNotifier on	2m 2s
Integration Tests / Test Examples/S3_Soto on	7m 59s
Integration Tests / Test Examples/BackgroundTasks on	1m 53s
Integration Tests / Test Examples/HelloWorld on	1m 53s
Integration Tests / Test Examples/Streaming on	1m 45s
Integration Tests / Test Examples/APIGateway+LambdaAuthorizer on	1m 55s
Integration Tests / Test Examples/HelloJSON on	1m 46s
Integration Tests / Test Examples/Testing on	1m 59s
Integration Tests / No dependencies on Foundation	2m 12s
Integration Tests / Test Examples/Tutorial on	1m 50s
Integration Tests / Test archive plugin (HelloWorld)	2m 27s
Integration Tests / Test archive plugin (ResourcesPackaging)	2m 24s
Unit tests / Unit tests / Linux (6.0)	1m 30s
Unit tests / Unit tests / Linux (nightly-next)	2m 1s
Unit tests / Unit tests / Linux (nightly-main)	2m 2s
Unit tests / Unit tests / Linux (6.1)	1m 27s
	56m 18s

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