Added tests for `ATTRIBUTION` & `DESCRIPTION` (#371) #432

Job	Run time
freebsd13 (CMake) (LLVM)	6m 37s
centos:7 (CMake) (GNU)	4m 29s
freebsd14 (CMake) (LLVM)	5m 35s
debian:11 (CMake) (GNU)	2m 3s
debian:12 (CMake) (GNU)	2m 4s
debian:12 (Latest Mapnik) (CMake) (GNU)	2m 15s
debian:testing (CMake) (GNU)	1m 58s
ubuntu:22.04 (Latest Mapnik) (CMake) (GNU)	2m 10s
fedora:38 (CMake) (GNU)	2m 33s
fedora:39 (CMake) (GNU)	2m 50s
macos-12 (CMake) (LLVM)	8m 55s
fedora:rawhide (CMake) (GNU)	2m 36s
macos-13 (Autotools) (LLVM)	10m 43s
opensuse/leap:15 (CMake) (GNU)	6m 32s
macos-13 (CMake) (LLVM)	8m 3s
ubuntu:20.04 (CMake) (GNU)	1m 54s
ubuntu:rolling (CMake) (GNU)	2m 13s
ubuntu:22.04 (Autotools) (GNU)	1m 42s
ubuntu:22.04 (Autotools) (LLVM)	2m 8s
ubuntu:22.04 (CMake) (GNU)	2m 11s
ubuntu:22.04 (CMake) (LLVM)	2m 3s
	1h 21m 34s

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