Make `constexpr` variables `static` or `inline` #5622

Job	Run time
build_linux (3.9)	39m 13s
build_windows (3.9)	51m 23s
build_windows (3.10)	50m 6s
build_linux (3.10)	36m 39s
build_windows (3.11)	51m 50s
build_linux (3.11)	36m 47s
build_windows (3.12)	50m 55s
build_linux (3.12)	38m 21s
build_windows (3.13)	51m 21s
build_linux (3.13)	37m 40s
test_examples_linux (3.11, false, ubuntu-22.04)	8m 11s
test_linux (3.9, false, ubuntu-22.04)	12m 1s
array-api-conformity (3.10, false, ubuntu-22.04)	5m 42s
test_linux (3.10, false, ubuntu-22.04)	12m 10s
test_linux (3.11, false, ubuntu-22.04)	11m 18s
test_linux (3.12, false, ubuntu-22.04)	11m 36s
test_linux (3.13, false, ubuntu-22.04)	11m 15s
upload_linux	0s
test_windows (3.9, false, windows-latest)	12m 25s
test_windows (3.10, false, windows-latest)	13m 24s
test_windows (3.11, false, windows-latest)	13m 52s
test_windows (3.12, false, windows-latest)	13m 8s
test_windows (3.13, false, windows-latest)	14m 58s
upload_windows	0s
Clean up anaconda packages	0s
	9h 44m 15s

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