Add tracking for neovim plugin

What does this MR do and why?

Add tracking for neovim plugin

This implements RedisHLL tracking for api requests made from the GitLab Neovim Plugin to GitLab.

Changelog: added

Follow up issue: #417080 to tidy the tracking code

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Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

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