move this to an accessory script?

right now this executes on every test run...
https://github.com/nebiolabs/EM-seq/blob/bc8546081dee3e789a292a6858e5a0135cc1273b/run_test.sh#L5\

to save time and github actions costs, can we pre-make these files once and provide them in the repo?

might also solve the failing tests