Use libxml2 for configuration parsing #1156

Job	Run time
Build on Fedora 38	2m 1s
Build on Windows (143, x86)	11m 2s
Build on Fedora 39	2m 8s
Run CodeQL tests	5m 32s
Build on Windows (143, x64)	10m 58s
Build on Fedora 40	1m 28s
Run Coverity tests	0s
Build on Windows (142, x86)	10m 36s
Build on Windows (142, x64)	10m 4s
Build on macOS for osx	12m 43s
Deploy pages	0s
Build on Ubuntu 20.04	3m 21s
Build on Ubuntu 22.04	3m 28s
Build on macOS for ios	4m 34s
Build on Ubuntu 23.10	3m 36s
Build on macOS for iossimulator	7m 56s
Build on Ubuntu 24.04	3m 54s
Build on macOS for androidarm	5m 5s
Build on macOS for androidarm64	5m 18s
Build on macOS for androidx86_64	5m 50s
	1h 49m 34s

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