BridgeJS: Take ownership of source Uint8Array id in `swift_js_init_memory` #2300

Job	Run time
check-bridgejs-generated	2m 37s
Build for native target (macos-15, Xcode_16.4)	2m 13s
build-examples	18m 10s
format	47s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 59s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	3m 2s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 2s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	3m 16s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	3m 16s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	3m 16s
deploy-examples	1s
	42m 39s

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