Snap

ci: enable AddressSanitizer #2888

Job	Run time
mir-libs (amd64)	20m 35s
mir-libs (armhf)	38m 53s
mir-libs (arm64)	50m 52s
snap (MirServer/mir-test-tools, amd64)	7m 53s
snap (MirServer/mir-test-tools, armhf)	31m 56s
snap (MirServer/mir-test-tools, arm64)	26m 39s
snap (MirServer/confined-shell-wip, amd64)	6m 38s
snap (MirServer/confined-shell-wip, armhf)	30m 29s
snap (MirServer/confined-shell-wip, arm64)	33m 32s
snap (MirServer/ubuntu-frame, amd64)	4m 30s
snap (MirServer/ubuntu-frame, armhf)	14m 32s
snap (MirServer/ubuntu-frame, arm64)	14m 12s
snap (Miriway/Miriway, amd64)	10m 6s
snap (Miriway/Miriway, armhf)	32m 52s
snap (Miriway/Miriway, arm64)	24m 54s
	5h 48m 33s

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