Multinode on MPS (#15748)

* Fix restarting attribute for lr finder
* update lite executor
* update trainer executor
* update spawn executor
* add multinode component tests
* add testing helpers
* add lite tests
* add trainer tests
* update changelog
* update trainer
* update workflow
* update tests
* debug
* add reason for skipif
* Apply suggestions from code review
* switch skipif

Co-authored-by: Jirka <jirka.borovec@seznam.cz>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Carlos Mocholí <carlossmocholi@gmail.com>
Co-authored-by: Adrian Wälchli <aedu.waelchli@gmail.com>
Co-authored-by: Jirka Borovec <6035284+Borda@users.noreply.github.com>