Add derived vehicle position trip metrics

[tiffanychu90]

Description

There are several vehicle position trip-grain metrics we want, and we'll join our derived metrics with the existing fct_vehicle_positions_trip_summaries:

• vp completeness (number of minutes with at least 2+ vp)
• spatial accuracy (% of vp within certain buffer of shape)

Note: think about the order of the data models:

• fct_vehicle_positions_trip_summaries (macro used) -> fct_vehicle_locations -> this table (combo of the prior 2 + more)
• I think this order makes sense, but is it confusing for there to be an automated-macro-produced summary table + another table that expands on it?

Resolves #3932

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation

How has this been tested?

23:12:35  1 of 1 START sql table model tiffany_mart_gtfs.fct_vehicle_positions_trip_metrics  [RUN]
23:12:55  1 of 1 OK created sql table model tiffany_mart_gtfs.fct_vehicle_positions_trip_metrics  [CREATE TABLE (707.5k rows, 5.1 GiB processed) in 20.07s]
23:12:55  
23:12:55  Finished running 1 table model in 0 hours 0 minutes and 34.81 seconds (34.81s).
23:12:56  
23:12:56  Completed successfully
23:12:56  
23:12:56  Done. PASS=1 WARN=0 ERROR=0 SKIP=0 TOTAL=1

Post-merge follow-ups

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