Document how delete_directory works on symlinks #5268

Job	Run time
Run C++ tests and coverage (ubuntu-latest)	1m 19s
build-mac-for-tags	0s
build-linux (3.10) / build-wheels	1m 38s
build-linux (3.11) / build-wheels	1m 31s
build-linux (3.12) / build-wheels	1m 36s
build-linux (3.8) / build-wheels	1m 32s
build-linux (3.9) / build-wheels	1m 37s
build-mac (3.12, macos-latest) / build-wheels	1m 36s
test-mac-for-tags	0s
test-mac (unit-tests, 3.12, macos-latest) / Run ert tests	1h 0m 14s
test-mac (gui-test, 3.12, macos-latest) / Run ert tests	16m 1s
test-mac (integration-tests, 3.12, macos-latest) / Run ert tests	13m 48s
Test ert docs (3.12, ubuntu-latest)	1m 58s
test-linux (gui-test, 3.11, ubuntu-latest) / Run ert tests	8m 20s
test-linux (gui-test, 3.12, ubuntu-latest) / Run ert tests	8m 38s
test-linux (gui-test, 3.8, ubuntu-latest) / Run ert tests	8m 33s
test-linux (integration-tests, 3.11, ubuntu-latest) / Run ert tests	9m 48s
test-linux (integration-tests, 3.12, ubuntu-latest) / Run ert tests	10m 45s
test-linux (integration-tests, 3.8, ubuntu-latest) / Run ert tests	10m 0s
test-linux (unit-tests, 3.11, ubuntu-latest) / Run ert tests	6m 22s
test-linux (unit-tests, 3.12, ubuntu-latest) / Run ert tests	7m 1s
test-linux (unit-tests, 3.8, ubuntu-latest) / Run ert tests	6m 58s
test-slurm (ubuntu-latest, 3.11) / Run ert tests	1m 45s
test-slurm (ubuntu-latest, 3.8) / Run ert tests	1m 43s
test-slurm (ubuntu-latest, 3.12) / Run ert tests	1m 56s
Publish to PyPI	0s
	3h 4m 39s

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