test: add more linux distros to test matrix #989

Job	Run time
Check for unneeded dependencies	1m 2s
Source code checks (stable)	33s
Build (x86_64/linux)	1m 56s
Source code checks (1.75.0)	29s
Benchmarks	9m 36s
Build (aarch64/macos)	2m 50s
Test (linux/x86_64)	1m 49s
Build (aarch64/linux)	2m 9s
Test (macOS)	1m 39s
Build (wasm32/wasi-0.2)	1m 17s
Build (x86_64/windows)	2m 13s
External tests / bash-completion test suite	8m 34s
OS target tests (Arch Linux/latest)	21s
OS target tests (Azure Linux/3.0)	1m 0s
OS target tests (Debian/testing)	14s
OS target tests (Fedora/latest)	29s
OS target tests (NixOS/latest)	3m 3s
OS target tests (openSUSE Tumbleweed/latest)	31s
	39m 45s

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