DCJ-519: Log dataset and study selection/unselection events to Bard

[rushtong]

Addresses

Partially addresses https://broadworkbench.atlassian.net/browse/DCJ-519

Summary

This PR adds metrics logging for selecting and unselecting datasets and studies on the data library page. It also slightly modifies the current event names to be more aligned with existing naming conventions.

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[aarohinadkarni]

looks good 👍

[fboulnois]

neat 👍