SNOW-1060154: Add telemetry for query plan height and num duplicate subtrees

[sfc-gh-aalam]

Please answer these questions before submitting your pull requests. Thanks!

1. What GitHub issue is this PR addressing? Make sure that there is an accompanying issue to your PR.

   Fixes #SNOW-1060154

2. Fill out the following pre-review checklist:

   • [x] I am adding a new automated test(s) to verify correctness of my new code
   • [ ] I am adding new logging messages
   • [x] I am adding a new telemetry message
   • [ ] I am adding new credentials
   • [ ] I am adding a new dependency

3. Please describe how your code solves the related issue.

   This PR add plan_height and num_duplicate_nodes in SnowflakePlan and Selectable class to compute characteristics of the query plan tree and report these in telemetry

[sfc-gh-jdu]

I assume it will be rebased after #1295 being merged?

[sfc-gh-aalam]

I assume it will be rebased after #1295 being merged?

yes

[sfc-gh-jdu]

Let's get Yijun's approval before merging

[sfc-gh-aalam]

Client performance when running union api when 50 columns and varying n calls: