BridgeJS: support imports of JS `Promise` as `async` Swift (#707) #2533

Job	Run time
Build for native target (macos-15, Xcode_16.4)	2m 17s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 14s
build-examples	20m 7s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	17m 27s
check-bridgejs-generated	2m 31s
prettier	8s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	3m 3s
format	34s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	13m 11s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	14m 25s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	14m 16s
deploy-examples	8s
	1h 31m 21s

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