flake8-simplify: avoid unnecessary builtins import for SIM105

[Jkhall81]

Summary

This PR fixes #22334 by updating the SIM105 fix to use get_or_import_builtin_symbol for BaseException.

Previously, the fix would always insert an unnecessary import builtins and use builtins.BaseException. This change ensures that BaseException is accessed directly as a builtin, only falling back to an explicit import if the name is shadowed.

Test Plan

• Executed the specific rule test suite: cargo test -p ruff_linter rule_suppressibleexception
• Verified the fix via snapshot diffs using cargo insta review.
• All 5 existing SIM105 tests passed after updating snapshots.

[astral-sh-bot]

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.

[MichaReiser]

Thank you