BridgeJS: Unify Swift type lookup logic between import/export #1947

Job	Run time
Build for native target (macos-15, Xcode_16.4)	4m 48s
check-bridgejs-generated	2m 48s
build-examples	42m 17s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	13m 2s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	13m 6s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	12m 52s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	13m 7s
format	32s
deploy-examples	0s
	1h 42m 32s

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