Update ICU4X to 2.2 #2186

Job	Run time
Test FFI (stable, ubuntu-latest)	34s
Lint	18s
Documentation	29s
Test feature matrix	1m 53s
MSRV	22s
Test (stable, macos-latest)	30s
Test (stable, ubuntu-latest)	30s
Test (stable, windows-latest)	1m 44s
	6m 20s

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