SCM metrics to be instrumented to support our customers and GitLab TAMs in understand product adoption phase 1

Add additional metrics to better support our sales team in understanding product adoption by individual customers to help them drive the discussion with their customers.

This issue is about the following metrics that the sales team considers their first priority in a longer list of metrics that they are looking for.

Metric name	What question will this address?
usage_activity_by_stage.create.amount_binary_files	It shows how many binary files are being stored.
usage_activity_by_stage.create.amount_binary_files_bigger_10mb	It shows how many big binary files are being stored.
usage_activity_by_stage.create.amount_binary_files_amounts_of_updates	It shows how often a single binary file is updated to understand if it becomes a problem in terms of sizing or not.