Add product analytics projects usage chart

What does this MR do and why?

Adds a chart to the new product analytics usage quota page, which shows the previous + current months usage for each project.

Merge request	status
create app structure	✔
projects usage table	✔
projects usage visualization	<-- you are here
total group usage visualization	⌛
feature flag rollout	⌛

Screenshots or screen recordings

Before	After
	(loading)
	(error state unchanged)
	(empty state unchanged)

Note that this MR uses the stack property, which is not yet available in @gitlab/ui until feat(GlColumnChart): allow setting stack option... (gitlab-ui!3778 - merged) is merged. I have not marked this MR as blocked by that one as it's behind a default-off feature flag, and we can deploy now and get the stacking update when it's ready. Until then, the chart will display stacked, instead of side-by-side.

Without fix	With fix

How to set up and validate locally

1. Requires GitLab Ultimate.
2. Follow these instructions to set up Product Analytics in your GDK.
3. Enable product analytics
4. Enable product_analytics_usage_quota feature flag
5. Visit a group -> Settings -> Usage Quota (verify empty state)
6. Onboard a project with product analytics
7. Visit a group -> Settings -> Usage Quota (verify chart renders as expected)

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

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

Related to #424151 (closed)