Reflect selected projects in tasks by type tooltip

What does this MR do and why?

Ensures we correctly set the count of selected projects that appear in the tasks by type chart tooltip

Screenshots or screen recordings

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Before	After

How to set up and validate locally

Creating a group level value stream

1. Ensure you have an EE license, or stub the cycle_analytics_for_groups license feature to true
2. Create a group
3. Create a project within a group (I recommend creating a project from a template such as the rails template)
4. Create a custom value stream for the new group you created
   Note: The first time you create a value stream in a group, a data aggregation needs to run, in gdk this is usually ~10mins, proceed to make a coffee in the meantime, relax ☕ 😎
5. Select a project from the project dropdown then
6. Hover over the information icon next to the Tasks by type title to see the tooltip text

MR acceptance checklist

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

Related to #364235 (closed)