[SwiftSyntax] Add #_objectFileFormat compilation conditional #111

Job	Run time
Validate generated code	2m 52s
Run tests using swift-syntax-dev-utils (Linux)	24m 33s
Run tests using swift-syntax-dev-utils (Windows)	47m 8s
Test / Linux (5.9 - jammy)	3m 54s
Test / Windows (5.9 - windows-2022)	24m 4s
Test / Linux (5.10 - jammy)	3m 53s
Test / Windows (6.0 - windows-2022)	23m 6s
Test / Linux (6.0 - jammy)	4m 7s
Test / Windows (nightly - windows-2019)	16m 6s
Test / Linux (nightly-main - jammy)	4m 47s
Test / Windows (nightly-6.1 - windows-2019)	15m 20s
Test / Linux (nightly-6.1 - jammy)	5m 1s
Soundness / API breakage check	0s
Soundness / Documentation check	5m 11s
Soundness / Broken symlinks check	3s
Soundness / Format check	35s
Soundness / License headers check	9s
Soundness / Python lint check	6s
Soundness / Shell check	40s
Soundness / Unacceptable language check	3s
Soundness / YAML lint check	5s
	3h 1m 43s

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