BridgeJS: Fix name collision for same-named nested structs #2636

Job	Run time
check-bridgejs-generated	2m 38s
Test BridgeJS against Swift versions (swift:6.1.2, 601.0.0)	35s
Test BridgeJS against Swift versions (swift:6.2, 602.0.0)	43s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	10m 45s
Test BridgeJS against Swift versions (swift:6.3, 603.0.0)	40s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	11m 9s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	11m 9s
prettier	9s
Build for native target (macos-15, Xcode_16.4)	3m 9s
build-examples	20m 49s
format	34s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	11m 10s
deploy-examples	-1s
	1h 13m 29s

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