[core] Only one `LambdaRuntime.run()` can be called at a time (fix #507) #609

Job	Run time
Unit tests / Construct unit test matrix	6s
Semantic Version label check	4s
musl	1m 42s
Soundness / API breakage check	2m 36s
Soundness / Unacceptable language check	5s
Soundness / Documentation check	1m 41s
Soundness / License headers check	5s
Soundness / Format check	39s
Soundness / Broken symlinks check	4s
Soundness / Python lint check	5s
Soundness / Shell check	31s
Soundness / YAML lint check	5s
Integration Tests / No dependencies on Foundation	2m 13s
Integration Tests / Test Examples/APIGateway on	1m 56s
Integration Tests / Test Examples/APIGateway+LambdaAuthorizer on	1m 54s
Integration Tests / Test archive plugin (ResourcesPackaging)	2m 39s
Integration Tests / Test archive plugin (HelloWorld)	2m 45s
Integration Tests / Test Examples/S3_AWSSDK on	6m 33s
Swift 6 Language Mode / Swift 6 language mode	1m 21s
Integration Tests / Test Examples/BackgroundTasks on	1m 58s
Integration Tests / Test Examples/ResourcesPackaging on	1m 49s
Integration Tests / Test Examples/Streaming on	1m 48s
Integration Tests / Test Examples/S3EventNotifier on	1m 59s
Integration Tests / Test Examples/Tutorial on	1m 49s
Integration Tests / Test Examples/HelloWorld on	1m 47s
Integration Tests / Test Examples/Testing on	1m 59s
Integration Tests / Test Examples/S3_Soto on	8m 7s
Integration Tests / Test Examples/HelloJSON on	1m 47s
Unit tests / Unit tests / Linux (6.1)	6h 0m 14s
Unit tests / Unit tests / Linux (6.0)	6h 0m 13s
Unit tests / Unit tests / Linux (nightly-main)	6h 0m 14s
Unit tests / Unit tests / Linux (nightly-next)	6h 0m 14s
	1d 0h 51m 2s

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