Since ad8a4b380e, the version printer returns "nix (Lix, like Nix) 2.x",
hence the `daemonVersion` was being set to the string "like".
Using `compareVersions` with a letter compares them lexicographically:
builtins.compareVersions "like" "2.12pre20230103" // => -1
builtins.compareVersions "like" "2.16.0" // => -1
This caused that `isDaemonNewer` always returned 1, falsy in Bash terms.
Therefore, the test suite skipped those tests where they use it.
Fixes https://git.lix.systems/lix-project/lix/issues/324
Change-Id: If6682515bf0bf8b8add641af9a4e98b50a9acb51
grepQuietInvert is a typo introduced by c11836126b.
The test functional-timeout was failing silently because Bash considered
the command-not-found error as truthy.
Change-Id: Ic13829d02ec55d6ecd63a0f4d34ec0d32379609f
