topdown+builtins: Restore legacy IgnoreDuringPartialEval list. (#5175)

This commit is a followup to the work done in PR #5172, and partially
reverts the changes there to avoid breaking library users of OPA.

The fix restores the `IgnoreDuringPartialEval` list while still
ensuring that non-deterministic builtins are not run during partial
evaluation.

Signed-off-by: Philip Conrad <philipaconrad@gmail.com>