refactor(ast_tools, allocator, napi/parser): rename vars

[overlookmotel]

Just rename variables, to prepare for substantive changes in following PRs.

[overlookmotel]

• feat(napi/oxlint): pass AST in buffer to JS #12350
• refactor(linter, napi/parser): add source_len field to RawTransferMetadata #12383
• refactor(linter): duplicate RawTransferMetadata in oxc_linter crate #12382
• feat(allocator): FixedSizeAllocator store flag recording if owned by both Rust and JS #12381
• feat(allocator): AllocatorPool store IDs in Allocators #12310
• refactor(allocator/fixed-size): store alloc_ptr in the memory block backing the allocator #12380
• refactor(ast_tools, allocator, napi/parser): rename vars #12379 👈 (View in Graphite)
• feat(allocator): add Allocator::end_ptr method #12330 : 1 other dependent PR (#12348 )
• refactor(linter): pass &Allocator into Linter::run_external_rules #12374
• main

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[codspeed-hq]

CodSpeed Instrumentation Performance Report

Merging #12379 will not alter performance

_{Comparing 07-17-refactor_ast_tools_allocator_napi_parser_rename_vars (8fe1aec) with main (de006a1)}

Summary

✅ 34 untouched benchmarks

[camc314]

Merge activity

• Jul 18, 8:48 AM UTC: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Jul 18, 8:48 AM UTC: camc314 added this pull request to the Graphite merge queue.
• Jul 18, 9:07 AM UTC: Merged by the Graphite merge queue.