.github: split distcheck into separate check + distcheck steps
.github: split distcheck into separate check + distcheck steps

 - We want log files from check archived
 - We want to verify that checks can run from tarball

Signed-off-by: Joachim Wiberg <583c295fd7602c168ad814279bbc3894ba65f5d6@gmail.com>

troglobit/finit,troglobit/finit