[SL-2201] Conversion Metric Filtering Tasklist

[tlento]

There are several issues with conversion metric filtering at the moment. This is the central task for keeping them together to ensure we don't forget any of these, and also some of them may resolve the other(s).

Tasks

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1. [SL-2184] Conversion metrics do not apply filters to input conversion measures #1199
   Feature Medium priority Metricflow bug +4
   
2. [SL-2194] Conversion metrics cannot render queries with filters unless the element is in the group by #1210
   Medium priority Metricflow +2
   
3. [SL-1845] [Bug] Conversion metric where metric_time clause returns not a number, BQ adapter #1072
   backlog bug linear +3

_SL-2201