zhouselena has created PR #2134: GODRIVER-3102: Perf comparison in mongo-go-driver

Issue Text:
GODRIVER-3102(https://jira.mongodb.org/browse/GODRIVER-3102)

1. 1. Summary
      After perf task is run, a perf comparison between the mainline benchmarks and the patch benchmarks is now made. This comparison calculates for h-score, z-score, and % change from the latest mainline stable region, and outputs the specific benchmarks that have a [95% confidence level](https://pro.arcgis.com/en/pro-app/latest/tool-reference/spatial-statistics/what-is-a-z-score-what-is-a-p-value.htm#:~:text=1%20percent%20probability&#41;.-,Confidence%20Levels,-The%20table%20below) of change (ie. where |z-score| < 1.96). Ultimately will be posted as a PR comment (but currently just outputs in Evergreen).

1. 1. Background & Motivation
      Have a better idea of how commits will affect performance before being merged into the mainline branch, more proactive than current method.