Remove EMBED_LTO_BITCODE #2756

Job	Run time
spell_check	7s
duplicates	5s
build_system	23s
build (gcc-15.deb, --test-successful-rustc --nb-parts 2 --current-part 0)	13m 47s
build (gcc-15-without-int128.deb, --extended-regex-example-tests)	6m 8s
build (gcc-15.deb, --test-successful-rustc --nb-parts 2 --current-part 1)	13m 50s
build (gcc-15.deb, --extended-regex-tests)	11m 47s
build (gcc-15-without-int128.deb, --test-libcore)	14m 13s
build (gcc-15-without-int128.deb, --std-tests)	5m 36s
build (gcc-15-without-int128.deb, --extended-regex-tests)	11m 47s
build (gcc-15.deb, --projects)	10m 29s
build (gcc-15.deb, --extended-rand-tests)	8m 0s
build (gcc-15.deb, --test-libcore)	14m 47s
build (gcc-15-without-int128.deb, --test-successful-rustc --nb-parts 2 --current-part 0)	13m 49s
build (gcc-15.deb, --std-tests)	5m 39s
build (gcc-15-without-int128.deb, --test-successful-rustc --nb-parts 2 --current-part 1)	15m 0s
build (gcc-15-without-int128.deb, --projects)	10m 55s
build (gcc-15-without-int128.deb, --extended-rand-tests)	9m 10s
build (gcc-15.deb, --extended-regex-example-tests)	6m 1s
success	3s
	2h 51m 36s

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