Bug fix: Apply metric_time
filters to time spine when needed
#1455
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There is currently a bug where, if you query a join_to_timespine metric with a metric_time filter that is not applied in the group by, you will end up with more rows than expected.
To fix that, we need to apply any metric_time filters to the time spine table before joining that table to the aggregated measure. This needs to happen before the join instead of after because after the join we may not have access to metric_time at the grain needed for the filter. This implements that behavior.
I recommend reviewing by commit.