Ensure tsconfig is passed to dts emit compile tests

[jakebailey]

This is needed otherwise errors go become detached.

[Copilot]

Pull request overview

Updates the test harness’s secondary “compile emitted .d.ts files” pass to carry through the original tsconfig source file, so diagnostics originating from tsconfig.json are reported with correct file/position context (preventing “detached” errors in baselines).

Changes:

• Plumbs ConfigFile from the initial program’s command line into the declaration re-compilation step (CompileFilesEx).
• Updates affected submodule compiler baselines to reflect attached tsconfig.json diagnostics (with file/line and underlines).
• Removes now-unnecessary .diff baselines for the affected tests (no longer diverging).

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
internal/testutil/tsbaseline/js_emit_baseline.go	Passes ConfigFile into the emitted .d.ts recompilation to attach tsconfig diagnostics properly.
testdata/baselines/reference/submodule/compiler/declarationEmitToDeclarationDirWithDeclarationOption.js	Baseline updated to show tsconfig.json-attached TS5011 with correct context.
testdata/baselines/reference/submodule/compiler/declarationEmitToDeclarationDirWithDeclarationOption.js.diff	Removed because the submodule diff is now empty (NoContent).
testdata/baselines/reference/submodule/compiler/commonSourceDirectory.js	Baseline updated to show tsconfig.json-attached TS5011 with correct context.
testdata/baselines/reference/submodule/compiler/commonSourceDirectory.js.diff	Removed because the submodule diff is now empty (NoContent).