Implement async version EnsembleEvaluator #5271

Job	Run time
Run C++ tests and coverage (ubuntu-latest)	1m 16s
build-mac-for-tags	0s
build-linux (3.11) / build-wheels	1m 34s
build-linux (3.10) / build-wheels	1m 34s
build-linux (3.12) / build-wheels	1m 35s
build-linux (3.8) / build-wheels	1m 35s
build-linux (3.9) / build-wheels	1m 33s
build-mac (3.12, macos-latest) / build-wheels	2m 23s
test-mac-for-tags	0s
Test ert docs (3.12, ubuntu-latest)	2m 24s
test-linux (gui-test, 3.11, ubuntu-latest) / Run ert tests	7m 48s
test-linux (gui-test, 3.8, ubuntu-latest) / Run ert tests	8m 0s
test-linux (gui-test, 3.12, ubuntu-latest) / Run ert tests	8m 14s
test-linux (integration-tests, 3.11, ubuntu-latest) / Run ert tests	9m 31s
test-linux (integration-tests, 3.12, ubuntu-latest) / Run ert tests	10m 4s
test-linux (integration-tests, 3.8, ubuntu-latest) / Run ert tests	9m 7s
test-linux (unit-tests, 3.12, ubuntu-latest) / Run ert tests	6m 44s
test-linux (unit-tests, 3.11, ubuntu-latest) / Run ert tests	6m 27s
test-linux (unit-tests, 3.8, ubuntu-latest) / Run ert tests	6m 49s
test-slurm (ubuntu-latest, 3.12) / Run ert tests	2m 6s
test-slurm (ubuntu-latest, 3.11) / Run ert tests	1m 43s
test-slurm (ubuntu-latest, 3.8) / Run ert tests	1m 40s
test-mac (unit-tests, 3.12, macos-latest) / Run ert tests	12m 47s
test-mac (integration-tests, 3.12, macos-latest) / Run ert tests	10m 57s
test-mac (gui-test, 3.12, macos-latest) / Run ert tests	14m 51s
Publish to PyPI	0s
	2h 10m 42s

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