BridgeJS: Fix SwiftHeapObject finalization registry leaks and double release #2343

Job	Run time
Build for native target (macos-15, Xcode_16.4)	2m 13s
prettier	8s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 52s
build-examples	20m 22s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	15m 1s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	12m 51s
format	29s
check-bridgejs-generated	2m 42s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	18m 31s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	19m 6s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 20s
deploy-examples	0s
	1h 37m 35s

Provide feedback