perf(es/parser): Reduce clone of token contexts

[bvanjoi]

I will close this if it's not shown any improvements.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 3325cc7

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[codspeed-hq]

CodSpeed Performance Report

Merging #10364 will improve performances by 2.47%

_{Comparing bvanjoi:pref-2 (3325cc7) with main (eb7f7e9)}

Summary

⚡ 1 improvements
✅ 151 untouched benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	es/lints/libs/terser	29.9 ms	29.2 ms	+2.47%

[kdy1]

It seems like it's about 0.2% ~ 0.5% faster. I looked at the performance details in https://codspeed.io/swc-project/swc/branches/bvanjoi%3Apref-2