Examples: Build SwiftSyntax in debug mode for macro plugins #2046

Job	Run time
build-examples	7m 22s
format	34s
check-bridgejs-generated	2m 46s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	7m 23s
Build for native target (macos-15, Xcode_16.4)	3m 12s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	7m 23s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	7m 22s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	7m 23s
deploy-examples	1s
	43m 26s

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