faster JSObjectSpace (JS runtime retain / release) #2477

Job	Run time
Build for native target (macos-15, Xcode_16.4)	3m 38s
format	46s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	3m 9s
prettier	8s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 1s
build-examples	1m 18s
check-bridgejs-generated	2m 35s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	13m 21s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	12m 19s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	18m 8s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	12m 54s
deploy-examples	0s
	1h 11m 17s

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