fix(decorators): scope 2023-11 implicit-global rewrite to decorator-lifted exprs

[kdy1]

Summary

Fixes #11742.

This change scopes the 2023-11 implicit-global rewrite to only decorator-related lifted/reordered expressions.

• remove the global implicit-global rewrite branch from DecoratorPass::visit_mut_expr
• add an expression-local rewriter (ImplicitGlobalUsageRewriter) for unresolved assignment/reference rewriting to globalThis
• apply the local rewriter only at 2023-11 decorator lifting points (super aliasing, decorator expression preservation, computed key pre-init)
• keep 2022-03 behavior unchanged
• add regression fixtures for:
  • decorator proposal fixture (2023-11-misc/no-decorators-unbound-assignment)
  • swc projects fixture (issues-11xxx/11742)

Test

• git submodule update --init --recursive
• UPDATE=1 cargo test -p swc_ecma_transforms_proposal
• cargo test -p swc_ecma_transforms_proposal
• cargo test -p swc --test projects -- issues-11xxx/11742 (filter matched 0 tests)
• cargo test -p swc --test projects fixture_tests__fixture__issues_11xxx__11742__input -- --ignored
• cargo fmt --all
• cargo clippy --all --all-targets -- -D warnings

[changeset-bot]

🦋 Changeset detected

Latest commit: 84ff3e8

The changes in this PR will be included in the next version bump.

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

Binary Sizes

File	Size
swc.linux-x64-gnu.node	28M (29077192 bytes)

Commit: bce39b2

[codspeed-hq]

Merging this PR will not alter performance

✅ 219 untouched benchmarks

---

_{Comparing kdy1/fix-11742-decorator-globalthis-regression (84ff3e8) with main (8d36f05)¹}

Footnotes

1. No successful run was found on main (6f72c47) during the generation of this report, so 8d36f05 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩