Disable warnings as errors on Swift 6 and main #136

Job	Run time
Soundness / API breakage check	2m 30s
Integration tests / 5.8	13m 1s
Benchmarks / 5.8	2m 34s
Cxx interop / 5.8	1m 2s
Integration tests / 5.9	14m 48s
Benchmarks / 5.9	3m 49s
Cxx interop / 5.9	1m 15s
Integration tests / 5.10	14m 22s
Soundness / Broken symlinks check	3s
Benchmarks / 5.10	3m 31s
Cxx interop / 5.10	1m 8s
Integration tests / nightly-6.0	16m 51s
Benchmarks / nightly-6.0	4m 56s
Cxx interop / nightly-6.0	1m 46s
Integration tests / nightly-main	16m 46s
Benchmarks / nightly-main	4m 33s
Soundness / Documentation check	1m 56s
Cxx interop / nightly-main	1m 38s
Soundness / License headers check	10s
Soundness / Unacceptable language check	5s
Soundness / Format check	0s
Unit tests / 5.8	3m 7s
Unit tests / 5.9	3m 14s
Unit tests / 5.10	3m 5s
Unit tests / nightly-6.0	4m 21s
Unit tests / nightly-main	4m 4s
	2h 4m 35s

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