Specify SwiftSyntax601 in more places. #130

Job	Run time
Run tests using swift-syntax-dev-utils (Linux)	24m 19s
Run tests using swift-syntax-dev-utils (Windows)	1h 4m 29s
Validate generated code	3m 2s
Test / Linux (5.9 - jammy)	4m 0s
Test / Windows (5.9 - windows-2022)	22m 42s
Test / Linux (5.10 - jammy)	3m 50s
Test / Windows (6.0 - windows-2022)	32m 12s
Test / Linux (6.0 - jammy)	4m 16s
Test / Windows (nightly - windows-2019)	15m 0s
Test / Windows (nightly-6.1 - windows-2019)	16m 18s
Test / Linux (nightly-main - jammy)	4m 47s
Test / Linux (nightly-6.1 - jammy)	4m 51s
Soundness / API breakage check	0s
Soundness / Broken symlinks check	4s
Soundness / Documentation check	2m 44s
Soundness / Format check	41s
Soundness / License headers check	12s
Soundness / Python lint check	11s
Soundness / Shell check	33s
Soundness / Unacceptable language check	3s
Soundness / YAML lint check	6s
	3h 24m 20s

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