Revert "Prefer ipv4 by default." #9695

Job	Run time
build_details	5s
build_details	5s
pre-commit	2m 51s
pre-commit	2m 51s
build_js	1m 22s
build_js	1m 22s
build_opam (4.14.x)	5m 35s
build_opam (4.14.x)	5m 35s
build_no_depopts	6m 5s
build_no_depopts	6m 5s
build_posix (debian_trixie, amd64)	16m 34s
build_posix (debian_trixie, amd64)	16m 34s
build_win32 (x64)	11m 12s
build_win32 (x64)	11m 12s
build_posix (debian_bookworm, amd64)	15m 58s
build_posix (debian_bookworm, amd64)	15m 58s
build_posix (ubuntu_jammy, amd64)	14m 0s
build_posix (ubuntu_jammy, amd64)	14m 0s
build_posix (ubuntu_lunar, amd64)	15m 43s
build_posix (ubuntu_lunar, amd64)	15m 43s
lezer_parse	52s
lezer_parse	52s
build_posix (alpine, amd64)	10m 27s
build_posix (alpine, amd64)	10m 27s
build_opam (5.0.x)	5m 17s
build_opam (5.0.x)	5m 17s
run_tests (@citest)	12m 40s
run_tests (@citest)	12m 40s
run_tests (@doctest)	8m 38s
run_tests (@doctest)	8m 38s
run_tests (@mediatest)	13m 4s
run_tests (@mediatest)	11m 31s
tree_sitter_parse	55s
tree_sitter_parse	55s
update_doc	0s
update_doc	0s
fetch_s3_artifacts	23s
fetch_s3_artifacts	23s
build_docker_alpine	0s
update_release	0s
update_release	0s
build_docker	0s
build_docker_minimal	0s
build_docker_alpine_minimal	0s
build_docker_release	0s
build_docker_release	0s
build_docker_release-minimal	0s
build_docker_release-minimal	0s
build_docker (amd64)	2m 18s
build_docker_alpine (amd64)	1m 47s
build_docker_minimal (amd64)	3m 14s
build_docker_alpine_minimal (amd64)	47s
	4h 49m 55s

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