feat(hstr): Introduce `Wtf8Atom` #31232

Job	Run time
List crates to benchmark	24s
Benchmark hstr	2m 20s
Benchmark swc_ecma_codegen	3m 9s
Benchmark swc_ecma_minifier	5m 28s
Benchmark swc_estree_compat	5m 28s
Benchmark swc_ecma_transforms_base	5m 28s
Benchmark swc_ecma_preset_env	5m 21s
Benchmark swc_ecma_lints	3m 20s
Benchmark swc_ecma_parser	3m 30s
Benchmark swc_ecma_transforms_typescript	5m 2s
Benchmark swc_css_parser	2m 53s
Benchmark swc_html_parser	3m 3s
Benchmark swc_ecma_lexer	2m 43s
Benchmark swc_ts_fast_strip	3m 35s
Benchmark swc_html_minifier	5m 27s
	57m 11s

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