fix(dashboards): Calculate bucket size from known good data#101201

gggritso merged 1 commit intomastergetsentry/sentry:masterfrom

georgegritsouk/dain-986-dashboard-crashes-while-trying-to-load-a-chartgetsentry/sentry:georgegritsouk/dain-986-dashboard-crashes-while-trying-to-load-a-chartCopy head branch name to clipboard