Add caches to timezone datagen (#6023) #2686

Job	Run time
Check Credentials for jobs that need JSON credentials	2s
WASM Demo	1m 35s
bench-binsize	2m 44s
bench-memory (macos-latest)	4m 8s
bench-memory (windows-latest)	9m 58s
bench-memory (ubuntu-latest)	3m 44s
bench-perf (components/collections)	4m 48s
bench-perf (components/locale)	2m 36s
bench-perf (components/datetime)	2m 24s
bench-perf (components/plurals)	6m 16s
bench-perf (components/locale_core)	5m 21s
bench-perf (components/segmenter)	3m 50s
bench-perf (provider/blob)	2m 30s
bench-perf (utils/fixed_decimal)	6m 9s
bench-perf (utils/litemap)	2m 15s
bench-perf (utils/tinystr)	8m 25s
bench-perf (utils/writeable)	4m 8s
bench-perf (utils/zerotrie)	5m 22s
bench-perf (utils/zerovec)	11m 5s
C++ docs	36s
Dart docs	1m 35s
Rust docs	5m 10s
TypeScript docs	42s
Deploy to GitHub Pages	8m 2s
	1h 43m 25s

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