Remove circularity, rootDir errors from node modules compiler tests

[jakebailey]

This unblocks microsoft/typescript-go#1797; the circularities in these tests don't appear to be required to test what the tests need to test. Rather, they were I think just a nice place to test imports of various kinds.

All of the tests were modified in the same way, splitting index.d.ts files like:

// @filename: node_modules/inner/index.d.ts
// cjs format file
import * as cjs from "inner/a";
import * as mjs from "inner/b";
import * as type from "inner";
import * as ts from "inner/types";
export { cjs };
export { mjs };
export { type };
export { ts };
export const implicitCjsSource = true;

Into two files:

// @filename: node_modules/inner/index.d.ts
// cjs format file
export const implicitCjsSource = true;
// @filename: node_modules/inner/test.d.ts
// cjs format file
import * as cjs from "inner/a";
import * as mjs from "inner/b";
import * as type from "inner";
import * as ts from "inner/types";
export { cjs };
export { mjs };
export { type };
export { ts };

To both declare a module, but do the import stuff in another place.

I ordered the files in the tests in a way that makes the diffs still try and compare apples-to-apples. so hopefully it shows that the types are still the same (though, sometimes named differently).

Also, drop rootDir errors from the tests by setting one manually.

[Copilot]

Pull Request Overview

This PR removes circular import errors from node modules compiler tests by separating test imports from module declarations. The tests were previously encountering circular definition errors that were blocking TypeScript-go integration, and these circularities weren't essential for testing the intended functionality.

• Split index.d.ts files into separate declaration and test files to eliminate circular imports
• Maintained test coverage while removing unnecessary circular dependencies
• Applied consistent pattern across all affected node modules tests

Reviewed Changes

Copilot reviewed 157 out of 157 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/cases/conformance/node/nodeModulesPackagePatternExportsTrailers.ts	Split index.d.ts into separate module declaration and test import files
tests/cases/conformance/node/nodeModulesPackagePatternExportsExclude.ts	Applied same pattern to eliminate circular imports while preserving test structure
tests/cases/conformance/node/nodeModulesPackagePatternExports.ts	Separated module declarations from import tests to resolve circularity
tests/cases/conformance/node/nodeModulesPackageExports.ts	Split imports into test.d.ts files to maintain functionality without circular errors
tests/cases/conformance/node/nodeModulesConditionalPackageExports.ts	Applied consistent separation pattern for module declarations and tests
tests/cases/conformance/node/allowJs/*.ts	Applied same refactoring pattern to allowJs variants of the tests
tests/baselines/reference/*	Updated baseline files reflecting the structural changes and error resolution