Refactor OpenPBS driver to use dataclasses #7976

Job	Run time
Run C++ tests and coverage (ubuntu-latest)	1m 31s
build-mac-for-tags	0s
build-linux (3.10) / build-wheels	1m 40s
build-linux (3.11) / build-wheels	2m 0s
build-linux (3.12) / build-wheels	1m 41s
build-linux (3.8) / build-wheels	1m 40s
build-linux (3.9) / build-wheels	1m 36s
build-mac (3.12, macos-latest) / build-wheels	1m 18s
test-mac-for-tags	0s
test-mac (gui-test, 3.12, macos-latest) / Run ert tests	12m 38s
test-mac (unit-tests, 3.12, macos-latest) / Run ert tests	12m 34s
test-mac (integration-tests, 3.12, macos-latest) / Run ert tests	10m 2s
Test ert docs (3.12, ubuntu-latest)	2m 28s
test-linux (gui-test, 3.11, ubuntu-latest) / Run ert tests	10m 26s
test-linux (gui-test, 3.12, ubuntu-latest) / Run ert tests	10m 51s
test-linux (gui-test, 3.8, ubuntu-latest) / Run ert tests	10m 34s
test-linux (integration-tests, 3.11, ubuntu-latest) / Run ert tests	7m 13s
test-linux (integration-tests, 3.12, ubuntu-latest) / Run ert tests	8m 10s
test-linux (integration-tests, 3.8, ubuntu-latest) / Run ert tests	7m 32s
test-linux (unit-tests, 3.11, ubuntu-latest) / Run ert tests	7m 28s
test-linux (unit-tests, 3.12, ubuntu-latest) / Run ert tests	7m 43s
test-slurm (ubuntu-latest, 3.11) / Run ert tests	1m 46s
test-linux (unit-tests, 3.8, ubuntu-latest) / Run ert tests	8m 0s
test-slurm (ubuntu-latest, 3.12) / Run ert tests	3m 6s
test-slurm (ubuntu-latest, 3.8) / Run ert tests	1m 50s
Publish to PyPI	0s
	2h 13m 47s

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