Revert "Drop to qsearch at low depth in razoring"

This reverts commit 5ec63eb6b6f43cbd4e25b8f8b97bc8980dbbabef.
Revert "Don't special case for abs(beta) >= VALUE_MATE_IN_MAX_PLY"

This reverts commit 55a3e0af8d0d1e169cc8b16541ffeb41e157b66e.