Find setup that allows injecting test samples

[jernst]

A long list of various 1) activity, 2) actor and 3) object variations has been collected in in https://codeberg.org/helge/funfedidev/src/branch/main/fediverse-pasture/work/test_results.toml (and converted from there into https://funfedi.dev/assets/samples.zip) into a test setup.

We should find a setup by which all of them can be used with applications-under-test to make sure they can handle them.

Note: license is CC0.

[steve-bate]

General support for parameterized tests would be useful for this and other tests (e.g., testing object is present in the required set of activity types).

[jernst]

This needs a special-purpose App that can participate in constellations like any other App.