Regression in `v6.0.0b*` due to exact matching of license expressions by default with `--allow-only`

[reactive-firewall]

Regression in tests after merging #316 fixes (PRs #361 & #362).

Should probably allow --allow-only='a;b;' to allow the License-Expression "a OR b" (a is in allow list && b is in allow list && expression is a OR b could be considered associative)

The complication is in non-partial-matching mode
This would require richer support for License expressions (e.g., still need to raise on a OR b OR c because of c is not in allow-list unless partial-matching mode)

[reactive-firewall]

See also https://github.com/raimon49/pip-licenses/actions/runs/32619234688