[MAINT] Update SYCL_INCLUDE_DIR_HINT seach to include clang 21 #5780

Job	Run time
build_windows (3.9)	38m 9s
build_linux (3.11)	33m 21s
build_windows (3.13)	39m 15s
build_windows (3.12)	37m 55s
build_linux (3.13)	34m 10s
build_windows (3.11)	39m 3s
build_windows (3.10)	38m 23s
build_linux (3.10)	33m 28s
build_linux (3.9)	34m 39s
build_linux (3.12)	33m 20s
test_examples_linux (3.11, false, ubuntu-22.04)	8m 10s
array-api-conformity (3.10, false, ubuntu-22.04)	5m 10s
test_linux (3.13, false, ubuntu-22.04)	11m 51s
test_linux (3.11, false, ubuntu-22.04)	12m 25s
test_linux (3.9, false, ubuntu-22.04)	11m 6s
test_linux (3.10, false, ubuntu-22.04)	10m 35s
test_linux (3.12, false, ubuntu-22.04)	10m 47s
test_windows (3.10, false, windows-latest)	12m 49s
test_windows (3.12, false, windows-latest)	13m 58s
test_windows (3.9, false, windows-latest)	15m 12s
test_windows (3.11, false, windows-latest)	13m 53s
test_windows (3.13, false, windows-latest)	14m 14s
upload_linux	0s
Clean up anaconda packages	0s
upload_windows	0s
	8h 21m 53s

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