test: add more linux distros to test matrix #987

Job	Run time
Build (x86_64/linux)	2m 1s
Source code checks (stable)	27s
Benchmarks	9m 16s
Build (aarch64/macos)	1m 32s
Source code checks (1.75.0)	23s
Build (aarch64/linux)	2m 8s
Build (wasm32/wasi-0.2)	1m 25s
Check for unneeded dependencies	1m 0s
Build (x86_64/windows)	2m 12s
Test (linux/x86_64)	2m 6s
Test (macOS)	1m 45s
External tests / bash-completion test suite	8m 47s
OS target tests (Arch Linux/latest)	18s
OS target tests (Azure Linux/3.0)	5s
OS target tests (Debian/testing)	21s
OS target tests (Fedora/latest)	22s
OS target tests (NixOS/latest)	33s
OS target tests (openSUSE Tumbleweed/latest)	34s
	35m 15s

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