[CI] add testing on musl #273

Job	Run time
musl	1m 30s
Integration Tests / Test Examples/HelloWorld on 6.0.1-amazonlinux2	1m 18s
Integration Tests / Test Examples/APIGateway on 6.0.1-amazonlinux2	1m 24s
Integration Tests / Test Examples/S3_AWSSDK on 6.0.1-amazonlinux2	4m 2s
Integration Tests / Test Examples/S3_Soto on 6.0.1-amazonlinux2	4m 29s
Integration Tests / Test archive plugin	2m 41s
Soundness / Documentation check	1m 26s
Soundness / License headers check	4s
Soundness / API breakage check	1m 43s
Soundness / Unacceptable language check	3s
Soundness / Broken symlinks check	4s
Soundness / Format check	34s
Soundness / Python lint check	0s
Soundness / Shell check	0s
Soundness / YAML lint check	6s
Swift 6 Language Mode / Swift 6 language mode	1m 5s
Unit tests / Unit tests / Linux (5.9)	24s
Unit tests / Unit tests / Linux (5.10)	24s
Unit tests / Unit tests / Linux (6.0)	1m 26s
Unit tests / Unit tests / Linux (nightly-6.0)	1m 46s
Unit tests / Unit tests / Linux (nightly-main)	1m 41s
	26m 10s

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