Incorporate latest ANSI tests or remove ANSI tests from suite

[eschaton]

The ANSI conformance tests have been updated since they were incorporated into the CCL test suite, so either the latest ANSI conformance tests should be incorporated or the ANSI conformance tests should be removed from the test suite.

(Note that in suggesting they could be removed, I'm not suggesting that a way to run them not continue to be incorporated. E.g. if a clone of ansi-tests is next to ccl-tests, maybe the tests could find and run them.)

[eschaton]

Removing the direct incorporation of the ANSI test suite could also make it easier to merge ccl-tests into the main ccl repository, and make running CCL’s own tests part of its build.

[phoe]

ANSI-TEST location: https://gitlab.common-lisp.net/ansi-test/ansi-test

[kyanha]

Where exactly is the canonical ansi-test suite location, anyway? The original author, Paul Dietz, left it in GNU Common Lisp's repository, but that apparently hasn't been updated for a long while. I'm seeing various typo fixes (as well as CCL-specific known-bug bypasses that don't use the notes mechanism, which is frankly a bit antithetical to the concept of canonicalization) here, and various updates (by people other than Paul Dietz) at common-lisp.net.

Who (if anyone) maintains the canonical suite? Are we stuck passing updates around between individual repositories without a canonical source?