Prerequisites checklist

• I have read the contributing guidelines.

AI acknowledgment

• I did not use AI to generate this PR.
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What is the purpose of this pull request? (put an "X" next to an item)

[X] Bug fix

What changes did you make? (Give an overview)

The preserve-caught-error suggestions insert , { cause: err } with fixer.insertTextAfter(argumentNode, ...). AST node ranges exclude wrapping parentheses, so for a parenthesized argument the text lands inside the parens and produces a sequence expression:

try { foo(); } catch (err) { throw new Error(("wrap")); }
// suggestion output before this fix:
throw new Error(("wrap", { cause: err }));

That makes the options object the error message ("[object Object]") and attaches no cause at all — re-linting the suggestion output reports the same problem again. The new AggregateError((errs)) variant is worse: the suggested code throws a runtime TypeError because the sequence expression's value isn't iterable.

This adds a small getLastArgumentToken helper that walks past the argument's wrapping close-paren tokens (stopping before the call's own closing paren) and uses it in the three argument-appending suggestion paths. Suggestion output is now:

throw new Error(("wrap"), { cause: err });
throw new AggregateError((errs), "", { cause: err });

Same bug class as #21045 (no-implicit-coercion, merged a few days ago).

Is there anything you'd like reviewers to focus on?

Three new RuleTester cases assert the exact suggestion output for parenthesized message, parenthesized errors array, and parenthesized message on AggregateError; they fail on the current code and pass with this change. All 52 rule tests pass.