BridgeJS: Support non-ConvertibleToJSValue async exported return types #2673

Job	Run time
build-examples	20m 26s
Build for native target (macos-15, Xcode_16.4)	2m 15s
prettier	11s
check-bridgejs-generated	3m 14s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	1m 25s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	1m 26s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	3m 23s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 57s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 18s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	1m 26s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	1m 9s
format	33s
deploy-examples	0s
	41m 43s

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