BridgeJS: Improve ts2swift diagnostics on invalid definitions #2349

Job	Run time
prettier	10s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	3m 37s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	2m 58s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	3m 54s
Build for native target (macos-15, Xcode_16.4)	3m 9s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	3m 54s
build-examples	19m 23s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	3m 0s
check-bridgejs-generated	2m 44s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	3m 53s
format	29s
deploy-examples	0s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	17m 32s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	13m 2s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	13m 52s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	13m 9s
check-bridgejs-generated	2m 44s
Build for native target (macos-15, Xcode_16.4)	3m 9s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	3m 0s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	2m 58s
format	29s
deploy-examples	-1415s
prettier	10s
build-examples	19m 23s
	1h 53m 4s

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