Allow dismissal of build minutes quota warning

Can you please allow the warning that pops up when build minutes are nearing the quota to be dismissed. It appears on every page and can be a bit annoying

2021-06-28 Update

Verified we still do not allow dismissal of warning. Also noting that the message is shown to Developer+ roles.

Implementation plan

• Persist the dismissal of the alert on the backend so it doesn't show again
• Hide the alert if the dismissal value is true on the backend
• Allow dismissal of the alert on the frontend
• When dismissed, send a request to the backend to update the dismissal value

Note: this plan is a suggestion, the engineer picking this up can modify it as they see fit.

Availability & Testing

Frontend specs (Vue) should accompany this change to ensure that clicking the dismissal button indeed closes the popup, in addition to a "smoke" test to ensure that this "×" button appears.