Closes#2946
currently we always evaluate the binary expression, then coerce it to
zero/null with the `ZeroOrNull` instruction, and then emit a separate
jump.
this is fine for non-conditional expressions where we are using the
value itself (e.g. in a SELECT result column), but in conditionals we
don't care about that at all and just want to either jump or not jump.
so: try to keep the spirit of code reuse, but still have distinct
implementations for conditionals and non-conditionals.
Reviewed-by: Preston Thorpe <preston@turso.tech>
Closes#2947
03cb84ef30