refactor(codegen): reduce repeated code

[overlookmotel]

Codegen contains the same code for getting the bytes of PS and LS characters in multiple places. Remove this repetition by exporting the consts from str.rs module, and using them everywhere else.

[overlookmotel]

• refactor(codegen): reduce repeated code #13191 👈 (View in Graphite)
• perf(codegen): faster splitting comments into lines #13190
• main

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[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #13191 will not alter performance

_{Comparing 08-18-refactor_codegen_reduce_repeated_code (51ca0ad) with main (ada4e84)¹}

Summary

✅ 34 untouched benchmarks

Footnotes

1. No successful run was found on main (e3bfff1) during the generation of this report, so ada4e84 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[Boshen]

Merge activity

• Aug 19, 12:32 AM UTC: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Aug 19, 12:32 AM UTC: Boshen added this pull request to the Graphite merge queue.
• Aug 19, 12:39 AM UTC: Merged by the Graphite merge queue.