[3.9] bpo-44708: Only re-run test methods that match names of previously failing...

[3.9] bpo-44708: Only re-run test methods that match names of previously failing test methods (GH-27287) (GH-27293)

* Move to a static argparse.Namespace subclass
* Roughly annotate runtest.py
* Refactor libregrtest to use lossless test result objects
* Only re-run test methods that match names of previously failing test methods
* Adopt tests to cover test method name matching

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>.
(cherry picked from commit f1afef5e0d93d66fbf3c9aaeab8b3b8da9617583)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>