[core] Only one `LambdaRuntime.run()` can be called at a time (fix #507) #581

Job	Run time
musl	1m 38s
Semantic Version label check	4s
Unit tests / Construct unit test matrix	3s
Integration Tests / Test Examples/APIGateway on	1s
Integration Tests / Test Examples/APIGateway+LambdaAuthorizer on	4s
Integration Tests / Test Examples/BackgroundTasks on	3s
Integration Tests / Test Examples/HelloJSON on	4s
Integration Tests / Test Examples/HelloWorld on	2s
Integration Tests / Test Examples/ResourcesPackaging on	4s
Integration Tests / Test Examples/S3EventNotifier on	2s
Integration Tests / Test Examples/S3_AWSSDK on	1s
Integration Tests / Test Examples/S3_Soto on	3s
Integration Tests / Test Examples/Streaming on	4s
Integration Tests / Test Examples/Testing on	2s
Integration Tests / Test Examples/Tutorial on	1s
Integration Tests / Test archive plugin (HelloWorld)	4s
Integration Tests / Test archive plugin (ResourcesPackaging)	16s
Integration Tests / No dependencies on Foundation	4s
Soundness / API breakage check	15s
Soundness / Documentation check	15s
Soundness / Unacceptable language check	3s
Soundness / License headers check	6s
Soundness / Broken symlinks check	3s
Soundness / Format check	14s
Soundness / Shell check	14s
Soundness / YAML lint check	2s
Soundness / Python lint check	4s
Swift 6 Language Mode / Swift 6 language mode	14s
Unit tests / Unit tests / Linux (6.0)	16s
Unit tests / Unit tests / Linux (nightly-next)	3s
Unit tests / Unit tests / Linux (nightly-main)	16s
	4m 45s

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