Add option for join cursors to return false positives from a Bloom filter

Hi!
In query to storage we can have conditions on fields without index. Therefor even for values, returned by join cursor we perform additional check. In addition we have more opportunities for that to make check the value to meet conditions faster then in code of __curjoin_entry_member. Given the above, it would be great to have an extra option similarly to "disable_checks_on_false_positive_errors=yes" for "strategy=bloom" in function join.