Use anonymous shared memory segments for `mod_tile.so` (#459) #718

Job	Run time
freebsd13 (CMake) (LLVM)	3m 27s
freebsd14 (CMake) (LLVM)	7m 53s
debian:11 (CMake) (GNU)	3m 31s
macos-12 (CMake) (LLVM)	7m 26s
debian:12 (CMake) (GNU)	3m 27s
macos-13 (CMake) (LLVM)	10m 50s
debian:12 (Latest Mapnik) (CMake) (GNU)	4m 5s
fedora:39 (CMake) (GNU)	4m 45s
macos-14 (CMake) (LLVM)	8m 38s
ubuntu:24.04 (Latest Mapnik) (CMake) (GNU)	3m 56s
fedora:40 (CMake) (GNU)	4m 10s
opensuse/leap:15 (CMake) (GNU)	4m 13s
quay.io/centos/centos:stream9 (CMake) (GNU)	5m 4s
ubuntu:22.04 (CMake) (GNU)	3m 42s
debian:unstable (CMake) (GNU)	3m 21s
fedora:rawhide (CMake) (GNU)	3m 40s
ubuntu:devel (CMake) (GNU)	3m 5s
ubuntu:24.04 (Autotools) (GNU)	2m 41s
ubuntu:24.04 (Autotools) (LLVM)	2m 26s
ubuntu:24.04 (CMake) (GNU)	3m 20s
ubuntu:24.04 (CMake) (LLVM)	3m 13s
	1h 36m 53s

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