BridgeJS: Fix optional Swift heap object handling for imported interface #2215

Job	Run time
build-examples	25s
Build for native target (macos-15, Xcode_16.4)	35s
check-bridgejs-generated	20s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	18s
format	17s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	18s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	27s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	20s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	25s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	22s
deploy-examples	1s
	3m 48s

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