Coq 8.17 deprecation warnings

[andrew-appel]

In various tactics such as fcf_skip, the use of "intuition" leads to this warning in Coq 8.17:

Warning:
"auto with *" was used through the default "intuition_solver" tactic.
This will be replaced by just "auto" in the future.

The quick-and-dirty way to fix this is to replace intuition with intuition auto with *. The cleaner way to fix it is intuition auto with XXX where XXX is the set of hint databases you really need.