Enhancement the progress callback mechanism so that the progress callback

Enhancement the progress callback mechanism so that the progress callback
is always invoked at least once at the end of a prepared statement if the
opcode count has been exceeded.  This makes the progress callback more
effective at limiting run times.  This check-in also includes and unrelated
performance enhancement to OP_Column.

FossilOrigin-Name: 68cce272e7f7cbc0c319ee8b7ff674d652cb1e95e903d99d848c41dff2b5d304