spm

[Vertex AI] Disable xcodebuild parallel testing #4963

Job	Run time
spm-package-resolved	1m 23s
spm-package-resolved	1m 23s
swift-build-run (macos-15, Xcode_16, spm)	10m 25s
swift-build-run (macos-15, Xcode_16, spm)	10m 25s
platforms (tvOS)	9m 41s
platforms (tvOS)	9m 41s
iOS-Device (macos-14, Xcode_15.3)	3m 56s
iOS-Device (macos-14, Xcode_15.3)	3m 56s
swift-build-run (macos-14, Xcode_15.3, spm)	1h 17m 37s
swift-build-run (macos-14, Xcode_15.3, spm)	1h 10m 33s
iOS-Device (macos-15, Xcode_16)	2m 17s
iOS-Device (macos-15, Xcode_16)	2m 17s
platforms (macOS)	7m 9s
platforms (macOS)	7m 9s
platforms (catalyst)	9m 43s
platforms (catalyst)	9m 43s
	3h 57m 18s

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