Use SwiftSyntax prebuilt action in CI #2717

Job	Run time
check-bridgejs-generated	3m 24s
format	35s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	20m 9s
Test BridgeJS against Swift versions (swift:6.3, 603.0.2)	2m 51s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	14m 49s
prettier	14s
Build for native target (macos-15, Xcode_26.0.1)	2m 38s
build-examples	43m 58s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	13m 26s
deploy-examples	1s
	1h 42m 5s

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