Add ccache #206

Job	Run time
build (linux/amd64, ubuntu-24.04, noble, clang, 17)	1m 58s
build (linux/amd64, ubuntu-24.04, noble, clang, 19)	1m 41s
build (linux/amd64, ubuntu-24.04, noble, gcc, 13)	1m 21s
build (linux/arm64, ubuntu-24.04-arm, jammy, gcc, 12)	1m 59s
build (linux/amd64, ubuntu-24.04, noble, clang, 16)	1m 50s
build (linux/amd64, ubuntu-24.04, jammy, gcc, 12)	1m 48s
build (linux/arm64, ubuntu-24.04-arm, noble, clang, 17)	2m 42s
build (linux/arm64, ubuntu-24.04-arm, noble, gcc, 13)	1m 55s
build (linux/arm64, ubuntu-24.04-arm, noble, clang, 16)	6m 41s
build (linux/arm64, ubuntu-24.04-arm, noble, gcc, 14)	1m 52s
build (linux/amd64, ubuntu-24.04, noble, clang, 18)	2m 53s
build (linux/amd64, ubuntu-24.04, noble, gcc, 14)	1m 27s
build (linux/arm64, ubuntu-24.04-arm, noble, clang, 18)	2m 12s
build (linux/arm64, ubuntu-24.04-arm, noble, clang, 19)	2m 7s
merge	0s
	32m 26s

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