Simplify intrinsics generation tool and regenerate intrinsics list #3115

Job	Run time
duplicates	6s
spell_check	9s
build_system	28s
build (gcc-15.deb, --extended-rand-tests)	8m 37s
build (gcc-15.deb, --extended-regex-example-tests)	6m 9s
build (gcc-15.deb, --extended-regex-tests)	11m 37s
build (gcc-15.deb, --std-tests)	5m 53s
build (gcc-15.deb, --test-libcore)	16m 0s
build (gcc-15.deb, --test-successful-rustc --nb-parts 2 --current-part 0)	14m 18s
build (gcc-15.deb, --test-successful-rustc --nb-parts 2 --current-part 1)	29m 6s
build (gcc-15.deb, --projects)	11m 40s
build (gcc-15-without-int128.deb, --std-tests)	5m 56s
build (gcc-15-without-int128.deb, --extended-regex-example-tests)	6m 46s
build (gcc-15-without-int128.deb, --extended-regex-tests)	11m 10s
build (gcc-15-without-int128.deb, --test-successful-rustc --nb-parts 2 --current-part 1)	14m 20s
build (gcc-15-without-int128.deb, --test-libcore)	16m 50s
build (gcc-15-without-int128.deb, --test-successful-rustc --nb-parts 2 --current-part 0)	13m 51s
build (gcc-15-without-int128.deb, --extended-rand-tests)	9m 0s
build (gcc-15-without-int128.deb, --projects)	11m 16s
success	2s
	3h 13m 14s

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