Use SwiftSyntax prebuilt action in CI #2707

Job	Run time
check-bridgejs-generated	2m 51s
build-examples	27m 33s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	18m 1s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	12m 40s
format	35s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	14m 1s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	8m 54s
Build for native target (macos-15, Xcode_26.0.1)	3m 13s
prettier	13s
deploy-examples	1s
	1h 28m 2s

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