BridgeJS: Fix codegen for Float/Double raw value enums in struct fields and optional context #1989

Job	Run time
check-bridgejs-generated	2m 44s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	17m 4s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	12m 52s
Build for native target (macos-15, Xcode_16.4)	2m 51s
format	40s
build-examples	44m 16s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	14m 0s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	12m 57s
deploy-examples	0s
	1h 47m 24s

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