Add support for native xml parsing. #11951

Job	Run time
build_js	2m 22s
build_opam (4.14.x)	7m 52s
build_details	5s
build_opam (5.2.x)	5m 37s
lezer_parse	46s
build_win32 (x64)	4m 53s
build_no_depopts	6m 41s
build_posix (debian_trixie, amd64)	7m 24s
build_posix (debian_trixie, arm64)	6m 56s
run_tests (@citest)	7m 26s
tree_sitter_parse	48s
build_posix (debian_bookworm, amd64)	7m 25s
run_tests (@doctest)	7m 23s
update_doc	0s
build_posix (debian_bookworm, arm64)	6m 58s
run_tests (@mediatest)	7m 22s
build_posix (ubuntu_oracular, amd64)	7m 23s
build_posix (ubuntu_oracular, arm64)	6m 41s
build_posix (ubuntu_noble, amd64)	7m 22s
build_posix (ubuntu_noble, arm64)	6m 54s
build_posix (alpine, amd64)	7m 23s
build_posix (alpine, arm64)	6m 57s
fetch_s3_artifacts	1s
build_docker	1s
build_docker_alpine	1s
build_docker_minimal	1s
build_docker_alpine_minimal	1s
update_release	1s
build_docker_release-minimal	1s
build_docker_release	1s
	2h 2m 46s

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