Use SwiftSyntax prebuilt action in CI #2727

Job	Run time
build-examples	1m 35s
prettier	-1s
Test BridgeJS against Swift versions	-1s
format	-1s
Build for native target	-1s
Build and Test	-1s
check-bridgejs-generated	-7s
deploy-examples	-1s
	1m 22s

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