Add support for specialization constants #6363

Job	Run time
build_linux (3.11)	6m 20s
build_windows (3.11)	9m 20s
build_windows (3.14)	8m 27s
build_windows (3.10)	9m 36s
build_linux (3.14)	6m 7s
build_linux (3.12)	6m 19s
build_linux (3.13)	6m 36s
build_windows (3.12)	8m 2s
build_linux (3.14, 3.14.* *_cp314)	5m 52s
build_linux (3.10)	6m 30s
build_windows (3.14, 3.14.* *_cp314)	9m 39s
build_windows (3.13)	9m 15s
test_examples_linux (3.14, 3.14.* *_cp314, false, ubuntu-latest)	5m 9s
test_examples_linux (3.14, false, ubuntu-latest)	5m 49s
test_linux (3.11, false, ubuntu-latest)	3m 18s
test_linux (3.10, false, ubuntu-latest)	3m 36s
test_linux (3.14, 3.14.* *_cp314, false, ubuntu-22.04)	3m 41s
test_linux (3.12, false, ubuntu-latest)	3m 27s
test_linux (3.13, false, ubuntu-latest)	3m 9s
test_linux (3.14, false, ubuntu-latest)	3m 22s
test_windows (3.14, false, windows-latest)	3m 23s
test_windows (3.11, false, windows-latest)	4m 25s
test_windows (3.14, 3.14.* *_cp314, false, windows-latest)	3m 45s
test_windows (3.10, false, windows-latest)	3m 49s
test_windows (3.12, false, windows-latest)	4m 18s
test_windows (3.13, false, windows-latest)	4m 11s
upload_linux	-1s
upload_windows	0s
Clean up anaconda packages	0s
	2h 27m 24s

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