chore: Add UBSAN option for cmake. #769

Job	Run time
Alpine (full, Debug)	12m 11s
Debian (minimal, Debug)	6m 3s
Docs	1m 52s
Fedora with ASAN	0s
Ubuntu LTS (full, Release)	7m 29s
Clang-Tidy	0s
Check for translatable strings	0s
Update nightly release tag	3s
macOS user	0s
Flatpak	11m 40s
macOS distributable (arm64)	4m 50s
macOS distributable (x86_64)	7m 48s
Windows (i686, Debug)	6m 55s
Android (arm64-v8a, Debug)	5m 10s
Windows (i686, Release)	6m 20s
Android (arm64-v8a, Release)	5m 24s
Windows (x86_64, Debug)	8m 50s
Windows (x86_64, Release)	8m 32s
	1h 33m 7s

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