CI: prefer ubuntu-latest when possible #1216

Job	Run time
Emscripten	2m 36s
macOS-deps=enabled	1m 26s
FreeBSD	5m 13s
macOS-deps=disabled	49s
MSYS2-UCRT64-deps=enabled	4m 57s
Linux-GCC7-deps=forcefallback	8m 26s
MSYS2-CLANG64-deps=enabled	3m 48s
Linux-Clang7-deps=forcefallback	8m 22s
MSYS2-UCRT64-deps=disabled	3m 45s
Linux-GCC7-deps=default	1m 12s
Linux-Clang7-deps=default	1m 18s
MSYS2-CLANG64-deps=disabled	3m 5s
Linux-GCC13-deps=forcefallback	14m 51s
Linux-Clang18-deps=forcefallback	9m 57s
Linux-GCC13-deps=default	3m 55s
MSVC-forcefallback-x64	4m 43s
Linux-Clang18-deps=default	2m 12s
MSVC-forcefallback-x86	4m 48s
clang-cl-forcefallback	7m 49s
MSVC-default-x64	2m 22s
clang-cl-default	4m 21s
MSVC-default-x86	3m 31s
	1h 43m 26s

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