Update falcosecurity-libs to latest (0.20.0). #953

Job	Run time
build-sysdig-linux (amd64)	25m 23s
build-sysdig-windows-latest-x86_64	1m 9s
build-sysdig-linux (arm64)	16m 25s
build-sysdig-macos-13-x86_64	1m 24s
build-sysdig-macos-14-arm64	1m 6s
	45m 27s

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