Tracking for hand raise lead modal

What does this MR do and why?

Tracking for hand raise lead modal

Related to the comment as a followup #334211 (comment 691466684)

Screenshots or screen recordings

How to set up and validate locally

1. Create a gitlab.com like GDK by making com? return true in lib/gitlab.rb
2. Enable feature flag

Feature.enable(:in_app_hand_raise_pql)

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.