[flang] Semantics checker for STOP and ERROR STOP statements - test file rename

Signed-off-by: Paul Osmialowski <pawel.osmialowski@arm.com>

Original-commit: flang-compiler/f18@b89137b6148d5d515757fb6ea9191ba23681f4c4
Reviewed-on: https://github.com/flang-compiler/f18/pull/367
Tree-same-pre-rewrite: false