Generate delay based on item count

[envex]

What does this implement/fix?

Make the animation delay for <DonutChart /> based on the slice count so larger data sets animate in faster.

Does this close any currently open issues?

https://github.com/Shopify/core-issues/issues/68903

Storybook link

https://6062ad4a2d14cd0021539c1b-thyldzcwtk.chromatic.com/?path=/story/polaris-viz-charts-donutchart-playground--animation-speed

Before merging

• Check your changes on a variety of browsers and devices.

• Update the Changelog's Unreleased section with your changes.

• Update relevant documentation, tests, and Storybook.

• Make sure you're exporting any new shared Components, Types and Utilities from the top level index file of the package

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
polaris-viz-core-cjs	61.36 KB (0%)	1.3 s (0%)	904 ms (-7.31% 🔽)	2.2 s
polaris-viz-cjs	215.96 KB (+0.04% 🔺)	4.4 s (+0.04% 🔺)	1.7 s (-3.46% 🔽)	6 s
polaris-viz-esm	176.29 KB (+0.02% 🔺)	3.6 s (+0.02% 🔺)	1.4 s (+7.34% 🔺)	4.9 s
polaris-viz-css	4.79 KB (0%)	96 ms (0%)	222 ms (-4.48% 🔽)	318 ms
polaris-viz-esnext	182.28 KB (+0.02% 🔺)	3.7 s (+0.02% 🔺)	1.3 s (+2.08% 🔺)	4.9 s

[michaelnesen]

Niceee 👏