[NFC] BridgeJS: Split out OptionalSupportTests.swift (#583) #2147

Job	Run time
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	3m 9s
build-examples	27m 17s
Build for native target (macos-15, Xcode_16.4)	4m 1s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	12m 51s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	13m 29s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	3m 0s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	13m 56s
check-bridgejs-generated	2m 46s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	17m 5s
format	32s
deploy-examples	11s
	1h 38m 17s

Provide feedback