Use SwiftSyntax prebuilt action in CI #2720

Job	Run time
format	36s
Test BridgeJS against Swift versions (swift:6.3, 603.0.2)	3m 2s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	14m 48s
prettier	15s
check-bridgejs-generated	3m 7s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	14m 50s
build-examples	14m 48s
Build for native target (macos-15, Xcode_26.0.1)	3m 23s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	12m 37s
deploy-examples	1s
	1h 7m 27s

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