Tests

fix: don't read .gitignore from above the git root #1683

Job	Run time
quick-test	4m 31s
pr-mutants (cargo)	6m 23s
test (macOS-latest, stable)	5m 48s
pr-mutants (nextest)	4m 4s
tests-from-tarball (ubuntu-latest)	2m 20s
test (macOS-latest, nightly)	9m 32s
cargo-mutants (0, cargo)	12m 33s
test (macOS-latest, 1.74)	6m 31s
cargo-mutants (1, cargo)	8m 13s
test (ubuntu-latest, stable)	5m 47s
cargo-mutants (2, cargo)	16m 16s
test (ubuntu-latest, nightly)	8m 40s
cargo-mutants (3, cargo)	12m 37s
test (ubuntu-latest, 1.74)	6m 39s
cargo-mutants (4, cargo)	10m 26s
test (windows-latest, stable)	10m 34s
cargo-mutants (5, cargo)	7m 18s
test (windows-latest, nightly)	16m 30s
cargo-mutants (6, cargo)	13m 14s
test (windows-latest, 1.74)	12m 29s
cargo-mutants (7, cargo)	9m 21s
cargo-mutants (8, cargo)	11m 30s
cargo-mutants (9, cargo)	9m 42s
overall-result	1s
	3h 30m 59s

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