Port TypeScript PR #60262: Include non-enumerable keys in __importStar helper

[Copilot]

This PR ports the changes from microsoft/TypeScript#60262 to include non-enumerable properties when importing modules with import * as syntax.

Problem

The previous __importStar helper only included enumerable properties when performing star imports, which could miss important non-enumerable properties that should be part of the imported namespace.

Solution

Updated the __importStar helper to use Object.getOwnPropertyNames() (with fallback) instead of a simple for...in loop. This ensures both enumerable and non-enumerable properties are included.

Before:

var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
    __setModuleDefault(result, mod);
    return result;
};

After:

var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
            return ar;
        };
        return ownKeys(o);
    };
    return function (mod) {
        if (mod && mod.__esModule) return mod;
        var result = {};
        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
        __setModuleDefault(result, mod);
        return result;
    };
})();

Changes Made

• Updated importStarHelper.Text in internal/printer/helpers.go
• Updated test expectations in internal/transformers/commonjsmodule_test.go
• Accepted baseline changes across all affected test files

Test Results

• ✅ All tests pass
• ✅ Many baseline diff files completely eliminated (28 files deleted)
• ✅ Remaining diff files significantly reduced
• ✅ Net result: 126 files changed, 1515 insertions, 2709 deletions

This change ensures the Go port maintains compatibility with the latest TypeScript behavior for star imports.

Fixes #1119.

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