Use clang. Looks like gcc is broken on mips64le in debian sid. #344

Job	Run time
build_and_test	9s
build_and_test_python (3.10, gcc, macos)	18s
build_and_test_python (3.10, gcc, ubuntu)	20s
build_and_test_python (3.10, clang, macos)	21s
build_and_test_python (3.10, clang, ubuntu)	32s
build_and_test_python (3.11, gcc, macos)	16s
build_and_test_python (3.11, gcc, ubuntu)	21s
build_and_test_python (3.11, clang, macos)	22s
build_and_test_python (3.11, clang, ubuntu)	38s
build_and_test_python (3.12, gcc, macos)	16s
build_and_test_python (3.12, gcc, ubuntu)	23s
build_and_test_python (3.12, clang, macos)	17s
build_and_test_python (3.12, clang, ubuntu)	37s
build_and_test_python (3.10, microsoft, windows)	1m 19s
build_and_test_python (3.11, microsoft, windows)	1m 8s
build_and_test_python (3.12, microsoft, windows)	2m 22s
build_in_docker (debian:sid-slim)	4m 58s
build_in_docker (debian:12-slim)	5m 16s
build_in_docker (ubuntu:latest)	5m 6s
publish_wheels	0s
	24m 59s

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