refactor(linter): use cow_to_ascii_lowercase instead cow_to_lowercase

[Boshen]

cow_to_lowercase is slow as it deals with unicode.

closes #8659

[Boshen]

• refactor(linter): use cow_to_ascii_lowercase instead cow_to_lowercase #8678 👈 (View in Graphite)
• main

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[graphite-app]

Merge activity

• Jan 23, 8:46 AM EST: A user added this pull request to the Graphite merge queue.
• Jan 23, 8:51 AM EST: A user merged this pull request with the Graphite merge queue.

[codspeed-hq]

CodSpeed Performance Report

Merging #8678 will not alter performance

_{Comparing 01-23-refactor_linter_use_cow_to_ascii_lowercase_instead_cow_to_lowercase_ (23b49a6) with main (883d25b)}

Summary

✅ 32 untouched benchmarks