Always generate a jsx implicit import specifier for tsx/jsx files

[weswigham]

Even if they are not modules, so we have the same error creation behavior as strada.

Fixes #3480

The changed tests not associated with the linked issue (which were testing a crash and find all refs, respectively) seem to show us no longer having a synthetic jsx import in non-jsx/tsx files (in the first, the jsx runtime file isn't in the build anymore because there's no jsx/tsx files, in the second, the jsx runtime file no longer gets an implicit ref to the jsx runtime file because it's not a jsx/tsx file), which seems more correct to me.

[Copilot]

Pull request overview

Adjusts program construction to always create the JSX implicit runtime import specifier for .tsx/.jsx files (even when the file is not an external module), aligning TS2875 error production with strada and fixing #3480.

Changes:

• Always create and resolve a synthetic JSX runtime import for ScriptKindTSX/ScriptKindJSX files, independent of “is external module / isolated modules” gating.
• Stop pulling JSX runtime types into builds that contain no .tsx/.jsx inputs (removing an unnecessary synthetic reference in non-JSX files).
• Update baselines to reflect restored TS2875 diagnostics and adjusted reference/find-all-refs behavior.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
internal/compiler/fileloader.go	Moves JSX runtime synthetic import creation out of the external-module/isolated-modules gate; limits it to TSX/JSX script kinds.
testdata/baselines/reference/tsc/composite/synthetic-jsx-import-of-ESM-module-from-CJS-module-no-crash-no-jsx-element.js	Updates buildinfo/baseline to no longer include jsx-runtime.d.ts when there are no TSX/JSX files.
testdata/baselines/reference/submoduleTriaged/compiler/commentsOnJSXExpressionsArePreserved(jsx=react-jsxdev,module=commonjs,moduledetection=legacy).errors.txt.diff	Removes triaged diff now that TS2875 matches expected output.
testdata/baselines/reference/submoduleTriaged/compiler/commentsOnJSXExpressionsArePreserved(jsx=react-jsx,module=commonjs,moduledetection=legacy).errors.txt.diff	Removes triaged diff now that TS2875 matches expected output.
testdata/baselines/reference/submodule/fourslash/findAllReferences/jsxFindAllReferencesOnRuntimeImportWithPaths1.baseline.jsonc.diff	Updates diff baseline: non-JSX file no longer gets an implicit runtime reference included in FAR.
testdata/baselines/reference/submodule/fourslash/findAllReferences/jsxFindAllReferencesOnRuntimeImportWithPaths1.baseline.jsonc	Updates baseline to reflect removal of the implicit runtime reference from a non-JSX file.
testdata/baselines/reference/submodule/compiler/commentsOnJSXExpressionsArePreserved(jsx=react-jsxdev,module=commonjs,moduledetection=legacy).errors.txt	Adds expected TS2875 diagnostic and adjusts error count/markers accordingly.
testdata/baselines/reference/submodule/compiler/commentsOnJSXExpressionsArePreserved(jsx=react-jsx,module=commonjs,moduledetection=legacy).errors.txt	Adds expected TS2875 diagnostic and adjusts error count/markers accordingly.