Use catalog games for tests

[tturocy]

This removes some games which were still in test_games, but now have been canonicalised in the catalog.

[rahulsavani]

This looks good to me. Bye bye e01.efg and e02.efg.

BTW, while the changes to the test suite look good as part of this review I "grep"ed e01.efg and e02.efg and found references to them in the docs in tools (in tools.enumpoly.rst for e01.efg and in {liap,lcp,simpdiv,enumpure}.rst for e02.efg). Perhaps you could just fix that in this PR.

[tturocy]

Good point. We don't have a great way to reference those (as paths would depend on the cwd of the shell) but I've done something sensible to make it clear they're catalog games. We'll likely be re-drafting this documentation with the planned reworking of the command-line tools anyway so this should do for present purposes.