test-status-rev: use same names as from generate-working-copy-states To prepare for using generate-working-copy-states.py for generating the files and their content, let's start by renaming the files according to the naming scheme used by that script.

test-revert: move embedded script to its own file Move the gen-revert-cases.py out of test-revert.t into its own file so we can reuse it from other tests (specifically test-status-rev.t).

test-revert: simplify generation of files With the recent change in naming of the generated files, it becomes much easier to generate the files by iterating over all the possible states than over the state transitions.