perf: use arc str for assets key

[SyMind]

Summary

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[SyMind]

!bench

[netlify]

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[rspack-bot]

📝 Benchmark detail: Open

Name	Base (2024-12-05 c26a11a)	Current	Change
10000_big_production-mode_disable-minimize + exec	36.9 s ± 632 ms	36.8 s ± 231 ms	-0.24 %
10000_development-mode + exec	1.81 s ± 44 ms	1.79 s ± 13 ms	-1.09 %
10000_development-mode_hmr + exec	638 ms ± 7 ms	641 ms ± 12 ms	+0.47 %
10000_production-mode + exec	2.34 s ± 47 ms	2.34 s ± 25 ms	-0.35 %
arco-pro_development-mode + exec	1.71 s ± 63 ms	1.73 s ± 61 ms	+1.16 %
arco-pro_development-mode_hmr + exec	425 ms ± 2.9 ms	424 ms ± 2.7 ms	-0.25 %
arco-pro_production-mode + exec	3.12 s ± 67 ms	3.13 s ± 81 ms	+0.35 %
arco-pro_production-mode_generate-package-json-webpack-plugin + exec	3.18 s ± 59 ms	3.16 s ± 56 ms	-0.58 %
threejs_development-mode_10x + exec	1.64 s ± 24 ms	1.65 s ± 16 ms	+0.60 %
threejs_development-mode_10x_hmr + exec	806 ms ± 4.8 ms	807 ms ± 12 ms	+0.05 %
threejs_production-mode_10x + exec	4.91 s ± 34 ms	4.94 s ± 51 ms	+0.51 %
10000_big_production-mode_disable-minimize + rss memory	10152 MiB ± 158 MiB	10128 MiB ± 57.9 MiB	-0.23 %
10000_development-mode + rss memory	805 MiB ± 78.1 MiB	783 MiB ± 8.93 MiB	-2.74 %
10000_development-mode_hmr + rss memory	1871 MiB ± 197 MiB	1966 MiB ± 320 MiB	+5.09 %
10000_production-mode + rss memory	664 MiB ± 33.8 MiB	677 MiB ± 54.9 MiB	+2.01 %
arco-pro_development-mode + rss memory	697 MiB ± 36.4 MiB	708 MiB ± 29.9 MiB	+1.67 %
arco-pro_development-mode_hmr + rss memory	890 MiB ± 56.5 MiB	863 MiB ± 63.7 MiB	-3.00 %
arco-pro_production-mode + rss memory	808 MiB ± 73.2 MiB	805 MiB ± 47.8 MiB	-0.34 %
arco-pro_production-mode_generate-package-json-webpack-plugin + rss memory	819 MiB ± 30.7 MiB	810 MiB ± 32.9 MiB	-1.12 %
threejs_development-mode_10x + rss memory	768 MiB ± 43.1 MiB	758 MiB ± 40.6 MiB	-1.27 %
threejs_development-mode_10x_hmr + rss memory	1722 MiB ± 324 MiB	1695 MiB ± 276 MiB	-1.59 %
threejs_production-mode_10x + rss memory	1088 MiB ± 86.1 MiB	1102 MiB ± 54.1 MiB	+1.35 %