Implement volatile store #2304

Job	Run time
duplicates	3s
build_system	25s
build (gcc-13.deb, --mini-tests)	6m 24s
build (gcc-13.deb, --std-tests)	6m 34s
build (gcc-13.deb, --test-libcore)	14m 22s
build (gcc-13.deb, --extended-rand-tests)	9m 24s
build (gcc-13.deb, --extended-regex-example-tests)	7m 22s
build (gcc-13.deb, --extended-regex-tests)	12m 31s
build (gcc-13.deb, --test-successful-rustc --nb-parts 2 --current-part 0)	17m 38s
build (gcc-13.deb, --test-successful-rustc --nb-parts 2 --current-part 1)	16m 42s
build (gcc-13.deb, --projects)	16m 41s
build (gcc-13-without-int128.deb, --mini-tests)	6m 11s
build (gcc-13-without-int128.deb, --std-tests)	6m 22s
build (gcc-13-without-int128.deb, --test-libcore)	13m 26s
build (gcc-13-without-int128.deb, --extended-rand-tests)	9m 38s
build (gcc-13-without-int128.deb, --extended-regex-example-tests)	6m 54s
build (gcc-13-without-int128.deb, --extended-regex-tests)	12m 3s
build (gcc-13-without-int128.deb, --test-successful-rustc --nb-parts 2 --current-part 0)	17m 30s
build (gcc-13-without-int128.deb, --test-successful-rustc --nb-parts 2 --current-part 1)	16m 42s
build (gcc-13-without-int128.deb, --projects)	16m 48s
	3h 33m 40s

Provide feedback