Add a Dogfooding Issue Template

.gitlab/issue_templates/Dogfooding.md

+<!--Lightweight issue template to encourage Dogfooding and educate team members about the importance of Dogfooding -->
+
+/label ~"dogfooding" ~"group::" ~"section::"  ~"Category::" 
+
+## Feature to Dogfood
+<!--Link to Description of feature (Documentation, Epic, Opportunity Canvas, etc.) -->
+
+## Goals
+<!--Level of Dogfooding you are looking for: problem validation, testing, production usage, etc  -->
+
+## Progress Tracker
+<!--List of tasks (e.g. a table with columns, project, status, issue links similar to what is [done here](https://gitlab.com/gitlab-com/www-gitlab-com/-/issues/8499))-->
+
+## Why Dogfooding is Important
+- https://about.gitlab.com/handbook/values/#dogfooding
+- https://about.gitlab.com/handbook/product/product-processes/#dogfood-everything
+- https://about.gitlab.com/handbook/engineering/#dogfooding