FunnelChartNext follow ups

[michaelnesen]

What does this implement/fix?

This PR removes the main percentage label in FunnelChartNext, and addresses a few follow up issues:

• https://github.com/Shopify/polaris-viz/issues/1784
• https://github.com/Shopify/polaris-viz/issues/1783

Does this close any currently open issues?

What do the changes look like?

• Main percentage is no longer shown at the top of the viz

• In the event that negative values are passed into the chart, we now handle them more gracefully:

Storybook link

https://6062ad4a2d14cd0021539c1b-yjjtqaptpo.chromatic.com/

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	61.73 KB (0%)	1.3 s (0%)	833 ms (+2.66% 🔺)	2.1 s
polaris-viz-cjs	228.78 KB (-0.07% 🔽)	4.6 s (-0.07% 🔽)	1.8 s (-14.35% 🔽)	6.4 s
polaris-viz-esm	185.24 KB (-0.04% 🔽)	3.8 s (-0.04% 🔽)	1.4 s (+3.9% 🔺)	5.1 s
polaris-viz-css	5.72 KB (0%)	115 ms (0%)	299 ms (-4.03% 🔽)	413 ms
polaris-viz-esnext	192.29 KB (-0.04% 🔽)	3.9 s (-0.04% 🔽)	1.5 s (-2.06% 🔽)	5.3 s

[mollerjorge]

Tested edge cases values in story book (negative, cero, big and small numbers), they look good!

Thanks for adding the tests as well 🙏