Simplifed `docker/docker-compose.yml` file (#368) #1371

Job	Run time
freebsd13 (CMake) (LLVM)	6m 8s
freebsd14 (CMake) (LLVM)	5m 22s
centos:7 (CMake) (GNU)	4m 26s
debian:11 (CMake) (GNU)	2m 15s
debian:12 (CMake) (GNU)	2m 1s
debian:12 (Latest Mapnik) (CMake) (GNU)	2m 26s
debian:testing (CMake) (GNU)	2m 16s
ubuntu:22.04 (Latest Mapnik) (CMake) (GNU)	2m 6s
fedora:38 (CMake) (GNU)	3m 7s
fedora:39 (CMake) (GNU)	2m 34s
fedora:rawhide (CMake) (GNU)	2m 53s
macos-12 (CMake) (LLVM)	7m 28s
macos-13 (Autotools) (LLVM)	8m 50s
opensuse/leap:15 (CMake) (GNU)	4m 45s
macos-13 (CMake) (LLVM)	8m 20s
ubuntu:20.04 (CMake) (GNU)	3m 2s
ubuntu:rolling (CMake) (GNU)	2m 0s
ubuntu:22.04 (Autotools) (GNU)	1m 39s
ubuntu:22.04 (Autotools) (LLVM)	1m 46s
ubuntu:22.04 (CMake) (GNU)	1m 48s
ubuntu:22.04 (CMake) (LLVM)	2m 2s
	1h 17m 14s

Provide feedback