Don't return TinyStr errors over FFI (#4940) #1835

Job	Run time
Check Credentials for jobs that need JSON credentials	2s
WASM Demo	2m 46s
bench-binsize	3m 37s
bench-datasize	1h 8m 3s
bench-memory (macos-latest)	3m 31s
bench-memory (ubuntu-latest)	3m 55s
bench-memory (windows-latest)	8m 34s
bench-perf (components/collections)	4m 39s
bench-perf (components/datetime)	4m 18s
bench-perf (components/locid_transform)	2m 40s
bench-perf (components/locid)	5m 19s
bench-perf (components/plurals)	6m 12s
bench-perf (provider/blob)	2m 14s
bench-perf (components/segmenter)	3m 52s
bench-perf (utils/fixed_decimal)	6m 11s
bench-perf (utils/litemap)	2m 9s
bench-perf (utils/tinystr)	6m 26s
bench-perf (utils/writeable)	3m 45s
bench-perf (utils/zerotrie)	5m 47s
bench-perf (utils/zerovec)	8m 38s
Rust docs	4m 56s
TypeScript docs	44s
Dart docs	1m 27s
C++ docs	1m 6s
Deploy to GitHub Pages	22m 2s
	3h 2m 53s

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