Correctly migrate `leading-*` classes (#16004) #1187

Job	Run time
Build x86_64-pc-windows-msvc (OXIDE)	4m 33s
Build aarch64-pc-windows-msvc (OXIDE)	3m 26s
Build x86_64-apple-darwin (OXIDE)	1m 14s
Build aarch64-apple-darwin (OXIDE)	1m 5s
Build aarch64-linux-android (OXIDE)	55s
Build armv7-linux-androideabi (OXIDE)	1m 0s
Build x86_64-unknown-linux-gnu (OXIDE)	2m 20s
Build aarch64-unknown-linux-gnu (OXIDE)	2m 15s
Build armv7-unknown-linux-gnueabihf (OXIDE)	2m 27s
Build aarch64-unknown-linux-musl (OXIDE)	2m 24s
Build x86_64-unknown-linux-musl (OXIDE)	2m 28s
Build and release Tailwind CSS insiders	3m 23s
	27m 30s

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