Fix wrong deallocation management for JSClosure with FinalizationRegistry #1573

Job	Run time
Build for native target (macos-15, Xcode_16)	33s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	4m 48s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.0.2-release/ubuntu2204/swift-6.0...	5m 17s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	7m 2s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	6m 6s
build-examples	11m 47s
format	34s
deploy-examples	0s
	36m 7s

Provide feedback