Add Debian Bookworm image with GCC 15 #147

Job	Run time
build (linux/amd64, ubuntu-24.04, bookworm, gcc, 12)	1m 30s
build (linux/amd64, ubuntu-24.04, bookworm, gcc, 14)	1m 33s
build (linux/amd64, ubuntu-24.04, bookworm, gcc, 13)	1m 44s
build (linux/amd64, ubuntu-24.04, bookworm, clang, 18)	1m 46s
build (linux/amd64, ubuntu-24.04, bookworm, clang, 16)	1m 42s
build (linux/arm64, ubuntu-24.04-arm, bookworm, gcc, 13)	2m 6s
build (linux/amd64, ubuntu-24.04, bookworm, clang, 17)	1m 49s
build (linux/amd64, ubuntu-24.04, bookworm, clang, 19)	1m 56s
build (linux/arm64, ubuntu-24.04-arm, bookworm, gcc, 12)	2m 27s
build (linux/arm64, ubuntu-24.04-arm, bookworm, clang, 19)	2m 4s
build (linux/arm64, ubuntu-24.04-arm, bookworm, gcc, 15)	1m 54s
build (linux/arm64, ubuntu-24.04-arm, bookworm, clang, 18)	2m 8s
build (linux/amd64, ubuntu-24.04, bookworm, clang, 20)	1m 50s
build (linux/arm64, ubuntu-24.04-arm, bookworm, clang, 20)	2m 6s
build (linux/arm64, ubuntu-24.04-arm, bookworm, gcc, 14)	2m 0s
build (linux/arm64, ubuntu-24.04-arm, bookworm, clang, 17)	2m 9s
build (linux/arm64, ubuntu-24.04-arm, bookworm, clang, 16)	2m 12s
build (linux/amd64, ubuntu-24.04, bookworm, gcc, 15)	1m 39s
merge	-1s
	34m 34s

Provide feedback