Use libxml2 for configuration parsing #1118

Job	Run time
Run CodeQL tests	4m 53s
Run Coverity tests	0s
Build on Fedora 38	2m 18s
Build on macOS for osx	26m 41s
Build on Fedora 39	2m 10s
Deploy pages	0s
Build on macOS for ios	18m 3s
Build on macOS for iossimulator	15m 47s
Build on Ubuntu 20.04	3m 51s
Build on macOS for androidarm	10m 5s
Build on Windows (143, x86)	10m 9s
Build on Windows (143, x64)	9m 43s
Build on Ubuntu 22.04	3m 13s
Build on macOS for androidarm64	9m 38s
Build on Windows (142, x86)	11m 38s
Build on macOS for androidx86_64	9m 58s
Build on Ubuntu 23.10	3m 12s
Build on Windows (142, x64)	11m 21s
	2h 32m 40s

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