BridgeJS: Unify Swift type lookup logic between import/export #1946

Job	Run time
build-examples	42m 50s
Build for native target (macos-15, Xcode_16.4)	2m 28s
format	33s
check-bridgejs-generated	2m 51s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	2m 47s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	3m 1s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	3m 3s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	3m 2s
deploy-examples	-1s
	1h 0m 34s

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