BridgeJS: Add runtime tests for `@JS class` to JSObject conversion #2338

Job	Run time
Build for native target (macos-15, Xcode_16.4)	3m 16s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	2m 57s
format	31s
check-bridgejs-generated	2m 38s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 13s
prettier	7s
build-examples	19m 43s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	13m 48s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	13m 11s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	17m 40s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	13m 0s
deploy-examples	-1s
	1h 30m 3s

Provide feedback