PackageToJS: Rename SWIFT_PATH to SWIFT_BIN_PATH env var #1948

Job	Run time
Build for native target (macos-15, Xcode_16.4)	2m 15s
format	34s
check-bridgejs-generated	2m 42s
build-examples	42m 42s
Build and Test (ubuntu-22.04, https://download.swift.org/swift-6.1-release/ubuntu2204/swift-6.1-R...	13m 51s
Build and Test (ubuntu-24.04, https://download.swift.org/development/ubuntu2404/swift-DEVELOPMENT...	13m 55s
Build and Test (ubuntu-22.04, https://download.swift.org/development/ubuntu2204/swift-DEVELOPMENT...	18m 3s
Build and Test (ubuntu-24.04, https://download.swift.org/swift-6.3-branch/ubuntu2404/swift-6.3-DE...	13m 24s
deploy-examples	0s
	1h 47m 26s

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