`locationEquals` in `lib/runtime/primitive_ops.ts` uses an arbitrary comparison distance of 2500m

[george1459]

This function is triggered by __builtin.equality in the compiled code. This arbitrary number can lead to unexpected problems, such as finding restaurants on yelp.

The best solution is to support a flag in manifest.tt to disable/customize this number.

The threshold is temporarily increased in wip/geniescript